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Let's Play Mermaids

Summary:

Blindfolded and bound. That is how Katsuki and Izuku are waking up, especially on how merchandise is shipped to the buyer. They had been reputable strippers at a club run by Kaminari Denki, well, that is until that club managed to be shut down due to him finally being arrested by the hero commission. Turns out, stealing pro heroes off the streets does land you in jail sooner or later. However, before Deku and Dynamight could’ve been rescued, they had been sold off to a high bidder that is running a legal casino. Everything by the book on the surface and below is another level of shade which gave Blood Riot the ability to take these two once known pro heroes and to turn them into his new entertainment. Merman performers.

 

MIND THE TAGS! IT IS DARK! Dolphin are involved. PLEASE READ THE TAGS. IF YOU ARE UNDER 18, DO NOT READ. I DO NOT OWN ANY OF THESE CHARACTERS!

Notes:

(See the end of the work for notes.)

Work Text:

Blindfolded and bound. That is how Katsuki and Izuku are waking up, especially on how merchandise is shipped to the buyer. They had been reputable strippers at a club run by Kaminari Denki, well, that is until that club managed to be shut down due to him finally being arrested by the hero commission. Turns out, stealing pro heroes off the streets does land you in jail sooner or later. However, before Deku and Dynamight could’ve been rescued, they had been sold off to a high bidder that is running a legal casino. Everything by the book on the surface and below is another level of shade which gave Blood Riot the ability to take these two once known pro heroes and to turn them into his new entertainment. Merman performers. Thanks to Kaminari, the heroes are trained to obey, but that training is due a quirk that is no longer functioning when he was taken in. Now Blood Riot has two new toys to break in and obey his commands without the need of an obedience quirk.

Katsuki groans as eyes flutter open from whatever drug that had kept him unconscious during the trip, however... Fuck how did.. Where.. He shook his head trying to clear his mind and refocus on where he was. He can still taste and hear but why does he only see black? Blindfolded. Damn it. Even trying to move his arms or legs resulted in nothing, only feeling rope. Silk? Maybe. Wait. Izuku. “De-..” Trying to speak only results in something shoved in his mouth, it is thick and girthy, maybe silicone? Katsuki’s tongue tries to push it out but fails after it settles in place. Kicking his legs out, he manages to hit something soft and small, by the small squeak he hears, bingo. Deku. He’s alive… That is what matters right now as escaping can be after they figure out where they are. The heavy scent of cherry blossoms and whiskey hit his nose, body suddenly tensing as he realizes immediately who has them, escape won’t be easy. Blood Riot. The number one villain, who has never been arrested due to how much pull he has in the political world, unlike Kaminari, Kirishima is smart in how he plays the game. He knows just what lines to cross and who will earn him the most protections. Dangerous to be his enemy and even more terrifying for those who cross him. Dynamight used to be his greatest rival until the incident that landed both him and Deku in Kaminari’s whore house. Now he seems to be in ownership of Blood Riot, leaving Deku caught in a cross fire. “Fuck me..” He would say if he could fucking talk, but no…

When the blindfolds are finally removed, his ruby eyes come face to face with that long red hair and sharp ass teeth. He breathes in a breath through his nose, staring down Blood Riot before his eyes wander the area, looking for Izuku only to land on a large aquarium tank behind the big villain. Blood Riot seems to know exactly what Katsuki is staring at because that voice rang in Katsuki’s ears, not because it’s loud but because it’s jarring to see him again. “Ah, you noticed the tank. Be glad I got you an aquarium sized tank and not a pet fish tank. You’re my new entertainment for my guests at this casino. You and your ...pet friend Izuku.” He said with the last part being full of venom, as if disgusted that Katsuki even has a friend. “No matter though, I have a use for you both.” Katsuki stares at the massive muscle man in front of him, biting down on the silicone trying to calm his nerves to no avail. “No response? Oh that’s right, you were trained to suck anything put in that mouth, looks like that quirk left you side effects. I will enjoy this.” The chuckle escaping from the villain left shivers down Izuku’s and Katsuki’s spine with the blonde now locking eyes with Izuku who also has some kind of gag made of silicone in his mouth. The end of it looks to be of an orange jewel? What jewel on his own if Izuku’s is orange, even that thought scares him, however, he wouldn't admit it. Not in front of the brute.

A knock on the door behind Riot that Katsuki just realized is open, snaps all three of their attention away from the tanks and conversation. Standing there is a gruff looking man with neck tattoos of roses and snakes, sapphire eyes and the stench of a recent cigarette break, and white hair. “Hey boss, sorry to interrupt but the quirk user you requested is here, she’s a handful though and is wanting her payment up front. She will also go over how the quirk works and what to watch out for. Do you want her to come back now or do you want to have your fun first? Either way, close the door since we are about to open for the evening crowd of gamblers.”

The sigh escapes Riot as he pinches the bridge of his nose. “Dabi, you’re lucky you’re the only one I tolerate to interrupt me. Yes, fine. Send her in.” Shaking his head, he continues. “I guess my fun with the two will wait til’ later.” He looks back at Izuku and Katsuki with a sly smirk forming on his face. “So, this is how it is going to go. Behave, entertain my guests, don’t cause scenes or trouble and I will be nice. If you break any of these rules, I will punish you and force the other to watch, don’t expect any mercy. I will have more to go over with you two, though that will wait since you two decided to be brats and sleep most of the day away.”

“Com’on boss, that quirk that kept them unconscious isn’t their fault.” Dabi interjects with a rub against the back of his neck until retreating away to fetch the new guest of theirs when Riot shot a warning glance. “Sheesh… Who pissed in your cheerios this morning?” Softly muttering as he walks away leaving the two alone with the cranky behemoth of a man.

Riot wordlessly reaches toward Izuku, pulling him over his shoulders and walks over to the tank. “You will be first and then your friend, Kacchan will join you. Try to escape or harm me and your precious Kacchan here will suffer the consequences. Understood?” He side eyes Izuku for a moment, placing him down on the ground to remove the bindings, only when he got a small nod from the greenette. “Though, Izuku. I give you this option. You can leave but Katsuki stays mine and only mine. If you try to come after him or interfere with any of my business, I will kill him before you and those pathetic heroes can arrest me or save him. Or. You can stay and suffer with him. Your choice.” He tilts his head and then smirks when Izuku tries to speak past the silicone gag. “I can’t hear you. I guess that means you get to stay! Good choice. You and Katsuki will be the stars of this place. You stay good, I stay good. Disobey or cause me headaches and you will suffer any ideas I come up with for punishments.”

Izuku looks up with his emerald eyes, glaring at Riot but doesn't dare make a move. Fucking asshole, using his Kacchan against him like this. Then giving an option for it only to be a trap or tease. If he hadn’t been gagged, he would’ve told Riot to shove it where the sun doesn't shine. Izuku's body reacts instantly, kicking out right at Riot in the back of the knee as hard as he could and moving towards Katsuki to try to free him while Riot is down. That is short lived, right when he reaches Katsuki, his ankle is grabbed at full force and yanked back. The echo of his body hitting the ground could be heard throughout the room. “You. Fucking. Little piece of shit. You're going to pay for that. Come here, pest!” Izuku feels a hand grab around his throat and get thicker with Riot’s quirk, enough that his breathing is cut off. “I told you what would happen if you caused issues.”

Izuku could see little fuzzy pieces with his eyesight as he got closer to passing out from the squeeze. He gasps when the hand eases up slightly and slammed into a chair, leather straps locking his wrists and legs down to it. “You'll suffer as much as your friend will. I promise you that.” Riot steps away before Izuku could even question as something snaps around his neck, digging into it as if fusing with skin. It didn't hurt, thankfully but that is the least of his problems because Riot turns and stares down Izuku. “That collar is a special design made by a friend of mine. You will obey one way or another, that collar will shock you every time I want it to. You're going to sit there and watch me punish Katsuki for what you did. Remember. You caused this.” Riot growls, snarling almost, not even seeing Dabi at the door who decides that now would not be a good time. The white haired man backs away slowly, quietly closes the door and leaves to tend to the extra guest of theirs for now.

Katsuki is shaking as he watches this all unfold, wondering why Izuku would be such a dumbass to try anything right then and there. His eyes move towards Riot when the guy steps away from Izuku and sets his sights on Katsuki, burrowing deep into the poor blonde's soul. Enough that he gulps when he is shoved against the wall and pinned by his neck, trying to move his arms but unable to do so. Any clothing he once has, now gone, naked. “I'm going to enjoy this.” Is the only thing Riot said when Katsuki is locked to cuffs attached to the wall, back to the villain. His chest presses up against the cold concrete with his nipples already getting hard and pointed. The silicone is the only thing giving him comfort as he desperately sucks upon it, hands squeezing his ass harshly and spreading the cheeks. “God. You already look so tight. Denki bitch really kept you well, didn't he? No matter.” The hands leave, giving Katsuki a moment of peace to relax, however that is short lived.

CRACK! A whip cracks against Katsuki's back, leaving a large red mark. Izuku struggles against the chair, looking away from the sight until he feels a zap to his neck. His eyes go back to Katsuki with a soft whimper. Katsuki clenches his hand into a fist from the first hit, a second strikes against his back and even a third. Tears roll down his face when he reaches the twelfth hit, shaking and whimpering through the silicone. He couldn't take much more with his back covered in red marks, skin broken and ripped up. “Oh I should mention. That's salt water.” He placed down the whip for now, moving towards Izuku to strip him of his clothes now. His hand squeezes Izuku's shoulder until it slides down to the front and flicks a nipple. “Fuck. I should mark you both as mine. Shouldn't I?” Izuku squeaks in surprise, shaking his head in denial as if begging. Of course, Riot ignores those squeaks and brings over a piercing set up kit. Two sets of nipple piercings with chains attached to them, both with red jewels. “You're my property and deserve something that shows the world the same statement. Branding will come next.”

Katsuki watches Riot pick up a needle and pierce each nipple on Izuku, even with the yelps through the silicone, he could tell how painful that was. Izuku clenches his eyes shut in order to hold back tears that are forming in the corners and hands shaking within the straps. He shook his head when Riot ruffles his fingers through the dark green curls, yanking swiftly once enough hair within the grasp and pulls back Izuku’s head to stare him down in the eyes. “You belong to me. Forever, brat. Learn that.” Riot growls low with a rumble from his chest as if he is an actual dragon. That is when his head snaps towards Katsuki sharply and his hands leave Izuku’s hair to move the piercing tray in front of the blonde.

“Fuck. No. Hey! No! Fuck off you fucker. Stay there!” He begs mentally as Riot moves towards Katsuki and his nipples next. The blonde threw his head back, screaming into the silicone, trying to figure out which hurt the worst; his back or now his nipples. Wait. What was mentioned about branding? It doesn't take long before that question is answered. Riot retreats from Katsuki's abused nipples and to a corner that's out of sight while he trembles against the wall. A large piece of metal covered in frost and pure white is the next thing Katsuki witnesses being held by Riot, placing it down on the table nearby as he examines something between both of his new toys’ legs. “Right. You both have pubes. Let’s take care of that first, yeah?” Like he would give either of these two the choice, it’s going to happen either way. Katsuki tenses up, clenching his hand into a fist and pulls against his bindings when Riot puts a hand on Katsuki's shoulder. Without any words, Katsuki suddenly is flipped over so he is facing away from the wall now, taking comfort with the cold wall against his back. Kneeling down in front of Katsuki is Riot who looks to be examining Katsuki’s hard cock and thumbing against his tip causing a few whimpers to escape the blonde.

Riot continues to thumbs the tip of Katsuki's dick, watching some precum drip down. “You’re turned on by this? I figured you were a slut but damn, what a good boy.” Did Katsuki get harder at the praise? Maybe but he won’t admit it outloud. That’s when Riot stands up and goes to grab something from a closet. From where Katsuki is bound to the wall, he can see what that crimson haired villain is grabbing, it wasn’t anything nice, that’s for sure. Riot retrieves wax strips, a few candles, a warming table and wooden sticks. He advances towards the blonde first, leaving Izuku to watch helplessly, though isn’t left alone per se. A sharp zap hits against Izuku’s neck once more, causing Riot to smirk slyly at the muffled sound of a cry. “Shh, you will be next, don’t worry, Midoriya.” His eyes remain on Katsuki as he applies the wax stripes along the pubes above the hard cock, squeezing Katsuki’s thigh and keeping him still. Katsuki tenses himself up as he knows what is about to happen as the strip edge is gripped by the rough hand and pulls off quickly with the sound of ripping hair echoing in the room. “That’s one down, two more to go.” Riot speaks over the soft whimper of Katsuki. The next strip is ripped off, leaving the skin red and inflamed almost from the rough treatment followed by the final strip removal. Riot being the asshole he is, slaps the now freshly waxed skin before standing up to advance his waxing skills upon a poor trembling Izuku. “Oh, looks like I am freshly out of wax strips. I used them all on Katsuki… No matter. I am great at improvising.”

In front of Izuku, the warmer station for the candles Riot had retrieved prior to waxing Katsuki as if he knew he didn’t have enough strips for the two. “Alright. Let’s see here.” Riot situates himself so he is right between Izuku’s leg and running his hand along the fuzz, pausing and then immediately smacks Izuku’s cock harshly. Izuku’s cock bounces as the greenette yelps in the silicone gag, shaking a bit. “You seem to like that. You’re getting hard from such a smack. Are you a pain slut?” The hand gradually lands on the balls and squeezes rather roughly until Riot gets bored, returning his sights on the dick and then up higher to where the fuzzy is once more. His hand reaches behind him to grab the candle wax that is now melted enough and hovers it above the pubes. The small whimper escaping Izuku is music to Riot’s ears as the wax pours down onto the pubes and perhaps on purpose, Izuku’s shaft and balls. “Had extra. Might as well not waste it.” Riot glances back up at the tear filled eyes of Izuku and smirks, enjoying the greenette shaking with fear at the thought of the removal. The heat of the wax already leaves the skin on the outside corners red and angry. Izuku jolts with surprise when he feels that hand patting across the cooled down wax and then prying at the corner on the left side above his cock. A scream stays buried within his throat when the first pulling occurs, slowly as if Riot is taking his sweet ass time with it. Then out of nowhere, the wax yanks off quickly in the process with a bunch of the pubes removed along the way. There’s still a good portion of this wax on his pubes closer to his cock and for sure the next victims of the wax. Riot rips it away from the skin, leaving the once pubed filled area, bare for the world to see and a crying mess scream from Izuku that somehow manages to get past the gag. Two fingers flick the freshly pierced nipples and then Riot stands up without a word, retrieving the cold frosted metal and walks over to Katsuki.

Katsuki tenses up, staring at the metal and looks up at Riot with fear in his eyes, shaking his head. “Shh. Be glad it isn’t the hot metal. I saved that for your friend over there for the kick I received from him.” His hand squeezes Katsuki’s shoulder in an effort of comfort, sliding down his hand and holding Katsuki’s chest still. The metal aims right above Katsuki’s cock, pressing right where it had been waxed. The sound that erupts from Katsuki manages to get past the gag as he arches off the wall, cock erect and releasing his seed messily down his front. Riot smirks watching the white leave the tip and cock, tilting his head with such fascination. “Did you just cum with that? Hot.” He places the metal pole over at the fireplace, waiting for it to heat up and returning his sight on the cock. The warm mouth licks up the seed from Katsuki’s tip, using that tongue to gather as much as possible while a hand reaches up to remove the gag for a moment. Once the gag is removed, Riot stands up with his tongue coated in Katsuki’s fresh liquid and locks his mouth with the blonde, forcing him to taste himself. A soft groan escapes Katsuki as he tastes the saltiness and Riot’s own tongue and kisses back. Katsuki slowly loses himself in the kiss, merely whimpering as the gag is placed back in his mouth and Riot grabs the red hot metal from the fireplace.

Izuku’s eyes grow wider at the sight of the metal going near him and his hands clench into a fist. His gaze stays on that red hot iron wishing he was anywhere else at that moment, feeling the heat as it got closer towards his dick before going higher, right above with it hovering. Riot leans forward with the metal getting closer to the spot until it presses against the flesh and the sizzling of skin drowns out the poor hero’s scream within that gag. “That’s right. Scream for your new master.” Growls Riot who holds the iron a little too long against the target until a moment later when it’s tossed to the side. Once both of his prizes calm themselves down, Riot sits down at his desk to go through paperwork and to recall Dabi back to the office with the hired guest.

—-

Dabi sighs softly as he makes his way towards the back office with a small woman that looks to be an average of thirty years of age. The woman raises an eyebrow as they make their way towards the office. “Something the matter? You still haven’t exactly told me why this meeting had been delayed.” Her eyebrow stays raised as she approaches the hallway for the back office, though she stills when she hears the muffled sounds of.. Moans? Groans? What the fuck.

Dabi facepalms as he shook his head. “Hey we hired you because you don’t ask questions or get too squamish. Are you wanting to back out now and we look for someone else to handle this task?” The look Dabi receives from the lady makes him almost chuckle. Almost. “No. I am not backing out per se. Just the noises, sounds intimate. Are you sure we are okay to enter?” She sighs with a huff as Dabi nods his head with a mumbled yes, placing his hand on the door knob and pushes open the door.

“Hey, boss. Are you ready?” His eyes stay trained on Riot the entire time with his best not to look at the naked two men that are bound by rope near the fish tanks. “I am, yes, Dabi.” Those crimson eyes of Riot turn and face the woman. “Ms. Mundane. Thank you for arriving for this matter. Now, I understand you want two million, one million for each quirk process for them, correct?”

Ms Mundane simply nods as she smirks looking at the two former heroes. “That’s correct. Though, the rules I should tell you now before I begin are as follows: They’ll stay human outside of salt water, if you want them to stay in the transformation, you’ll keep them in salt water. The first shift will take a bit longer but they'll be able to breathe underwater from the start. It’s not a pleasant feeling either so you must limit their time outside the water, unless you wish to make them suffer. Either way, I don’t judge. I’ll need to return once a year to renew the quirk and my fees may change as I age. Do we have an agreement?” She smirks with her eyes remaining on the big hulking Blood Riot himself which the smirk only grows wider when Dabi walks behind Riot and presents her a big case. “I counted it myself, two million. All yours after they’re affected by your quirk.” All she asks next is which one is first.

—-

Izuku and Katsuki are tossed into the tanks that contain salt water. The one type that activates the quirk they had been affected by. They’re separated by a glass wall divider, helplessly looking at each other and unable to reach their hands out in comfort, Katsuki has his hand on the glass, staring at Izuku in concern. The quirk quickly takes a hold as their legs start to fuse together and their hands grow webbing between their fingers, each of them expressing discomfort. As true to Mundane’s word, they could breathe and the worst has yet to come. Or cum? Who knows what is planned for the two until Riot stands from his office chair watching the two with a sick twisted smile upon his face. Izuku’s attention from Katsuki rips away to several masked figures that venture in and take seats behind Riot. Opera glasses included. “Welcome in for our pre-show grand opening of the mermaid bay! I am glad you could be here for tonight’s event.” Riot addresses the figures and then turns facing the two transforming mermen. Izuku has a shimmering emerald tail with frills on the end and lightning patterns within the scales, similar to how black whip looks when active. Katsuki’s tail shimmers with orange and a black tip, sharp spines down his back and leading to the back tip. Within the scales pattern resembles his explosions as sparkles and stardust. “Tonight, I have specially trained dolphins to show them the ropes. Dolphins are the bully of the sea and attack whatever they see in the water with their dicks just for giggles. We get to see them teach these two mermen how to fuck!” He pauses in dramatics not even giving a chance for the mermen to process what’s about to happen.

Steel doors beep before opening instantly as two dolphins on each side swim out into the tank. One moves for Katsuki with a high pitch noise of desire, the other circles in case the blonde decides to try to swim away. Katsuki doesn’t even get a chance to escape as the dolphin smacks Katsuki against the glass, his back to the glass, right in front of Izuku who is helpless to watch as the dolphin hits Katsuki with its underside, grinding against him until the flexible appendage slides out to find the slit that is forming within him. With Katsuki’s arms flailing behind him with effort to push off the wall, he manages to find a purchase and for some reason the dolphin grinding against him allows him to move off the wall. When he does, the other dolphin finds the opportunity to grind against Katsuki's back, making him feel the appendage that awaits him if he tries to flip around. He groans the feeling of an appendage hitting against his newly formed slit, gasping when it starts to enter, shoving the long fifteen inch dolphin cock far until it lands against Katsuki's hidden tip and sliding under to go further. Too long as Katsuki arches up and unintentionally grinds right back to the dolphin behind him.

This only made the two dolphins more eager and ready to breed Katsuki, slamming into his slit roughly without any care for his comfort. The dolphin grinding against his back increases its movement and manages to open its mouth, latching onto Katsuki's right shoulder. The one thrusting into the slit bites down on the left shoulder, forcing the blonde to stay still. Katsuki screams out in pain arching up and coating the appendage inside himself in fresh seed from his hidden cock.

Riot merely smirks, leaning back in his office chair and watching the action. His hand grinds against his own hard cock to calm the ache building within it. He wondered what one of them would look like bouncing on his cock while the other was used by whatever he deems fit. He unzips his pants to allow his cock its freedom, stroking his shaft and soft groans escaping him. The crowd behind him has the same thought, though some came here with partners and could hear them getting busy. Riot cares more about his own pleasure than the people behind him, signaling Dabi over with a soft smile. “Feeling turned on as well, Touya?”

Dabi growls low at the name as he narrows his eyes. “Told you not to call me by that name, boss.” He crosses his arms before sighing softly. “Yeah. Could say I'm a little turned on by the scene. Whatcha wanna do about it?” He raised an eyebrow, kneeling down to get a better look at Riot’s twitching cock. His mouth leans over encasing it in warmth leading Riot to exhale in pleasure and hands curling up into the white hair and pushing Dabi's mouth down further. “Fuck. I forgot about your magical mouth…” Riot whispers arching up, feeling Dabi's tongue tease the tip and shaft. Dabi smirks, teasing again from that reaction exactly and sucks slowly. Riot groans with a soft gasp, arching more into the mouth, cock twitching and dripping precum onto that tongue.

Izuku isn’t having any better luck either or experience as his mouth gets shoved onto the first dolphin’s bottom half, pushing against the mouth as the eighteen inch appendage escapes the dolphin's slit and enters Izuku's mouth, sliding down the throat. Conveniently, Riot had removed those gags before being tossed into the water, shocker. Izuku gags on the appendage feeling it dive into his throat and explore deeper, going places it really shouldn't. The other dolphin decided to take it's place at Izuku's bottom half, nudging at the newly formed slot as if trying to get the hidden cock exposed. Finding no use in such a tiny dick, the dolphin grinds itself against the slit, eager for its own pleasure and the appendage of twelve inches long catches at the edge. Aligning itself once more, it manages to slide in and go past the tiny dick. Both dolphins moved in time with each other, fucking Izuku deeply without mercy.

Izuku’s eyes filled with tears that form bubbles on the corners as he helplessly moans through the process. Both mermen are moaning loudly, dropping into sub space quickly as the dolphins take their turns with them. The one face fucking Izuku let's out a high pitch squeal, closer to its climax as it sends some precum down Izuku's throat and slides down further causing Izuku to start to have spots in his vision. The dolphin leans its snout down and bites down onto the shoulder harshly. A scream ripples through the appendage down Izuku's throat, vibrations instead of sound. Izuku gains a stream of dolphin cum going down his throat and into his guts. The other dolphin increases its thrusts, harshly and closer to its own climax. After a few more, a wave of warm seed erupts from the dolphin and right into the other cum already in Izuku's body.

Riot in time with the dolphins sends his own cum down Dabi's throat, forcing Dabi to swallow it down. “That's a good boy, Touya.” He grins, smirking at the glare he received from his underling. “What will you do about it?” Suddenly, Dabi stands up and moves in front of Riot, closer to the lips, kissing and twisting his tongue around Riot’s. While distracted by the kiss, Riot’s pants are removed and boxers down to the ankle as his legs are spread apart. “Just for that, little cherry blossom, I'm going to make you scream in pleasure while you fuck my ass.” Dabi growls darkly as his own pants and boxers are moved, moving onto Riot’s lap. Riot gasps, feeling his cock slide right into Dabi’s tight ass, hands squeezing tightly at the thighs. Dabi groans, taking in the full thing, bottoming out as he closes his eyes in pleasure.

Dabi starts to bounce, fucking himself on Riot’s cock while his own cock is erect and aimed towards the chest. He arches his back, bouncing faster as if eager to fill his guts with the boss’s seed, clenching down. “Fuck! Quirk your dick already. I want it thicker, boss. Please!” It's cute how much Dabi is begging Riot, almost makes him want to follow the request and indulge Dabi with the thicker cock. The more he bounces, the more desperate the fire user gets, nails digging into Riot’s arms with soft pants and his cock dripping with precum.

The cock finally reaches double the size within Dabi's ass when Riot activates his quirk, causing Dabi to moan extra loudly. “God. Yes. Finally! Thank you! Fuck…” He slams himself down in order to hit his prostate. Riot growls, running out of patience and finally grabs Dabi’s hips, bouncing Dabi himself instead and hitting right at the spot. He doesn’t wait to abuse Dabi’s prostate roughly. “Who made who scream?” Riot huffs a bit with amusement while listening to the pant with moans, a single word escapes that’s music to Riot's ears. “Daddy!” Dabi yells out as Riot comes deep into his new pet’s guts, arching up and taking it all. So much cum causing the stomach to extend slightly, belly bulging as if Dabi were pregnant..

Riot looks up from a panting Dabi and glances at the bored dolphins who leave the two mermen on the bottom of the tanks. The dolphins are now fucking each other as they leave through the steel doors. “Dolphins…” Riot rolls his eyes at their retreat before looking back at Dabi. Once his cock is done filling him, Riot stands up to let Dabi rest in the chair. He gets both of them dressed for now, though beforehand, he shoves a blue jeweled butt plug into Dabi's ass. For a moment, Riot smiles genuinely at the resting man and then his attention to the crowd.

“I hope you enjoyed the show! For those who wish to, tickets are on sale for the shark feast for them! First come, first serve for picking!” Riot laughs, happy for how well it turned out. For now, he allows the two merman to rest from the assault and the casino closes up for the night. Fish food would be left within the tanks for the two to eat, Riot might be a dick but he isn’t heartless to allow his two new pets to starve. That’s cruel even for him.

—-

The next morning, Izuku is prodded awake by a finger poking his cheek. His eyes blink a few times within the water and realizing what happened last night actually happened. Fuck his bottom half is sore as is his throat. He coughs a few times as he looks around until he catches a glimpse of Katsuki and that finger poking. They’re in a whole different tank that is set up all around the casino on the ceiling and walls, giving them the opportunity to move about and explore. Izuku tilts his head as he follows Katsuki around the coral decorations and seaweed, almost like a game as they follow each other. Maybe there is a hiding spot? Doubt it… Worth a check though. His attention quickly attached to fish swimming about with them, thankfully no dolphins in the area, for now and hopes it stays that way. His stomach rumbles looking at the fish, contemplating if he should. What if it's poisonous or something? Fuck it. Izuku quickly darts at one, grasping it within his sharp talons.

Katsuki turns and watches Izuku hungrily strike a fish to eat, tilting his head and softly groaning at his own stomach rumbling. If Izuku doesn’t get sick from it, he will grab a fish as well. He gives it a few minutes for any side effects before he would grab a fish and eat it himself.

After about two hours of exploring and finding a few places to hide if needed, Katsuki sees Riot accompanied by two others. One he recognized as Dabi and the other one a female with pink hair and pink skin. Alien Queen. Aka Mina. All three of them seem to watch Izuku and Katsuki within the tank as Mina tilts her head. “What a fine prize indeed, Riot. I see why there is a long line outside waiting to get in. This is their grand opening, right? Are you sure they will behave?” She flutters her eyelashes at him as if trying to flirt. Riot snickers, smirking towards her and obviously dodging her poor efforts. “I am sure. I doubt they want to revisit the dolphins again, though I could get really creative if I really wished to.” He looks back at Katsuki and Izuku, his hand placed on the glass and watches with ideas swirling within his mind. “You two better perform and entertain my guests. Do well and you gain a reward. Do poorly and let’s just say, I can be worse than those dolphins.”

Katsuki gulps as he instinctively reaches for Izuku’s hand and holds it tightly, giving a few squeezes for reassurance. He nods agreeing with Riot as he looks around, wondering how to be entertaining for the guests. “Oh and one more thing. If Katsuki fails, Izuku is punished and you get to watch. Izuku fails and Katsuki is punished with Izuku forced to watch. Got it?” Riot adds before walking away with the two others that are behind him, heading to the doors in order to open for the day. Security stationed at all exits, cameras pointed at the machines and tables, and now there are a few security teams near the tank watching both of the merman closely. Ready to report any issues.

Katsuki tries to relax a bit, managing to do so until the area gets busy. A lot of people approach the tanks to gaze upon Katsuki and Izuku for the rarity they are. Though two figures catch his eye, one with purple messy hair and the other with red eyes and a grey scarf. Wait. Aizawa? Shinsou? Are they here to save them? Katsuki swims forward and tries to wave them down, unsuccessfully until Izuku joins the blonde's side. Both of them waving, the two pro heroes glance over at the two and move to the tanks with concern. “What are you two doing here? We've been looking for you for so long.” Shinsou being the first one to speak up as he puts his hand on the tank. Aizawa’s eyes didn't match the smile of relief as if he’s plotting something as he tilts his head, examining the two as if they’re prey. It made both mermen uneasy but not enough to question, having their full trust in these two pro-heroes. Katsuki assumes he’s just seeing things at this point as he sighs softly. “You’ve no idea how happy and glad you two are here. Wait. What are you even doing here? Not exactly a pro-hero hang out…”

Izuku hesitates a moment, gulping hard. “We were sold here. I.. There isn’t an escape for Kacchan and I. We’re trapped by a quirk. Maybe you two can figure something out? Be careful, Blood Riot’s around and isn’t alone.” His eyes pleadingly looking at the two. Aizawa and Shinsou both look at each other then back to the two mermen, silently deciding on an idea.

“Give us a moment, we will see what we can do.” Aizawa disappears back into the crowd and heads to the back office. When his back is to Katsuki and Izuku, he smirks mischievously. Oh he would help alright… himself and have Shinsou join him. What was that event? Right. Shark feast. Maybe he should attend with Shinsou, the two mermen are being naughty and deserve a good dick. Once Aizawa steps into the back office, he looks over at the items on the wall and the specially designed large tank that is being installed for the shark feast on the camera feed in a different part of the casino. “Riot. Been a while, hasn’t it? I see you have my past brat students here.” His tired eyes meeting crimson as he crosses his arms, smirking.

Riot himself returns the same smirk as he leans back in his chair at the desk and crosses his arms. “Miss Mina, mind giving us the room for now? Dabi can show you around while I speak with our new guest here.” He speaks to the figures in the back corner going over details on how Katsuki and Izuku were trained last night. With Mina and Dabi nodding their agreements, they step out, leaving Aizawa to speak with Riot in private. “Eraserhead, it’s been a while. What, two years since our last meeting where you let me go from custody? Are you here to finally cash in your favor?” He raises an eyebrow while standing up.

“I heard you are having an event with the two newly acquired entertainers. I want in. Mindbreak and I wish to have our fun with those two. Would that be an option for our little deal to even itself out?” Aizawa grins, licking his teeth at the idea of fucking his graudates. “My cock’s already hard at just the sheer idea of that perfect pink pucker of Katsuki Bakugou’s. His friend Izuku Midoriya’s just icing on the cake!” Aizawa eyes wander back to the camera feed as workers install the rather large tank, expanding about four hundred feet and about hundred feet in height. (400ftx100ft) Sand is being added in the corner, resembling a beach and the rest would be salt water with decorations. Ocean’s Paradise sign right above in neon nights also being installed above. The ultimate items being added gives Aizawa even more reasons to be excited. A few of Riot’s men are installing a large table that has leather cuffs and leg restraints that adjust and a padded breeding bench nearby while a few other items are installed in the background to give more options for the special event.

Chuckling, Riot crosses his arms once more as he leans back against the wall. “Damn. That’s a high ask. I mean yeah, I do owe you one for the early release, however, tickets are already on sale and I’ve had so many offers! They’re truly popular. Got anything else to sweeten the pot, Eraserhead?” He tilts his head all innocently. Though, he straightens up when Aizawa smirks.

“Sweeten the pot… Hmm. I have favors with the current Commission President. Hawks. I can get him to turn a blind eye to this establishment for the seeable future. Oh and I can throw in Shinsou anytime you require your newly acquired entertainers to be trained. His quirk would come in handy with that. Could also fuck him, I don’t really care.” Aizawa shrugs so simply as if he’s ordering from a dinner menu.

Back outside of the office at the fish tanks, Izuku and Katsuki look at each other with relief, unaware of the true goal of their past teacher. Shinsou tilts his head. “How long have you two been here anyways, more importantly, are you okay?” His eyes wander along the two bodies and the tank, taking in every detail he could examine, sighing softly before looking back at Katsuki who is biting his lip out of stress or concern. The blonde finally answers after a moment with a shaky voice. “Terrified honestly and maybe a day now? Two?” His tail flicks behind him, sending a few fish scattering to a different side of the tank..

Shinsou raises an eyebrow, glancing around once more. He wonders what was taking so long before heading towards the back office. “I'll go find Eraserhead. Hold on a little longer and we’ll be back later. Can't make a scene with this crowd.” He doesn’t wait for the two to respond to him as he makes his way to the back, crossing his arms while fixing his hero weapon.

The voices in the office draw his attention, stepping to the door and knocking. A soft come on could be heard from Aizawa, allowing Shinsou to step inside. He closes the door behind him, tilting his head at the two figures smirking at him. “Hm? Something on my face?” His eyes go towards the camera feeds, eyeing the tank then back. “Are we participating in the event?” The attention goes back to Aizawa and Riot, bowing in respect to the casino owner.

“We are. Yes. But you're going to be on call to Riot here, for anytime he needs your quirk for the next month. Deal? Oh and any ideas or plans he wishes to do with you or the mermaids.” Aizawa shrugs as if he didn't just sell his adopted son to the highest bidder for just a piece of Katsuki's ass. He smirks looking at the camera feeds, licking his lips while Shinsou blinks a few times. Did he just get sold out to Riot?

Yes, yes he did by his own adoptive father Aizawa.

Notes:

If you would like a squeal with Aizawa and Shinsou getting involved, let me know!