Work Text:
Senku woke up feeling surprisingly good. It was warm but comfortable. He felt a bit disoriented until his hand grazed the warm body next to him. Gen.
Senku's eyes shot open. His hand moved on its own toward Gen before he was fully aware of it. He stopped just short of Gen's face. Gen looked so pretty and relaxed.
Senku couldn't help himself and he brushed aside a few strands of hair from Gen's face.
Gen's nose twitched a little and his eyes fluttered open. Gen too was clearly a bit disoriented at first and it was adorable. “G’ mornin’ Senku”, Gen yawned.
“Good morning. - Did you sleep well?” Senku asked.
Gen slowly looked up so that he could see Senku's face better. “I think so? Took me a while to fall asleep but other than that good. How about you?”
“I slept better than I have in a while”, Senku smiled.
“That's nice. You look much better than yesterday.”
“Thanks”, Senku snorted. Then he continued more sincerely, “You look good too”.
“That was not what I meant”, Gen squirmed. “I just wanted to say you look well rested.”
“I know what you meant, but I also meant what I said.”
The corners of Gen's lips turned upwards even though he was trying to fight the smile.
Senku caressed Gen's cheek. Then he used his index finger to lift up Gen's head. Gen's neck was so pretty arched like that. Senku could see Gen shiver and blush.
Senku could also see Gen trying to hide a morning wood.
“Did you have good dreams?” Senku asked smiling michievously.
“Sure”, Gen said. He could feel his cheeks burn.
“Did you dream about me?” Senku asked while leaning closer.
“I think you can guess the answer to that.”
“But I want to hear you say it out loud.” Senku said in a way too chipper voice.
“Ugh.”
“Not the tone I was looking for, nor an answer to my question.”
“I forgot how good you are at riling me up.”
Senku didn't bother to answer with words and just smirked.
“You are so unfair”, Gen complained.
“Yet you like me.”
“Yet I do.”
“I just love how needy you get. Makes me feel good to see how much you want me”, Senku explained. “But we should probably stop for now.”
“I hate you”, Gen moaned and buried his head into a pillow.
“No you don't”, Senku answered and leaned in to whisper in Gen's ear. “I promise to take care of you later if you still want it.”
Then Senku drew away and pretended like he hadn't done anything. “Anyway, breakfast?”
Gen groaned into the pillow. “Gimme a minute. I should have tea and something edible in the kitchen.”
“I'll go warm up some tea”, Senku announced with a wide grin and left Gen alone.
It took a while but Gen managed to calm himself with some breathing exercises and then got himself dressed.
When he reached the kitchen, there was a cup of tea waiting for Gen on the table. Senku was preparing rice and something else he had found in the cupboard.
Senku was concentrated on the chopping board and hadn't noticed Gen's arrival yet so Gen observed him for a while. Yep, this is the man Gen loves. The man who apparently loves Gen back. Senku had said so yesterday.
Gen stepped closer and took the tea that was meant for him. “I used to wonder how you managed to survive just by yourself after the petrification but I keep forgetting that you can do anything, even cook.”
Senku looked over his shoulder and hummed. “You can't expect gourmet but it's better than nothing.”
“I'm sure it is good. Will you keep on making me food from now on?”
“What do I get in return?”
“A happy boyfriend?”
Senku chuckled, “I'll find you things to do too, so it won't just be me doing the cooking.”
Then Senku turned contemplative. “Boyfriend” he said to himself as if testing out the word. Then he turned to Gen. “Is that the label we are going with?”
“Did you have something else in mind?”
“No, this is just new for me. Boyfriend works fine. - Could you get me another pan by the way.”
“Sure”, Gen said and handed him what he was looking for. So very domestic. Domestic Senku was adorable. Could Gen have this every day?
“I was thinking,” Senku started, “Do you want to move in with me or should I bring my stuff here?”
Gen sputtered.
Senku continued without noticing Gen's reaction. “You have a cozy apartment so I wouldn't be opposed to moving here, but you don't have a lab attached to your place so I might need to figure out something for that.”
Gen made a strange noise and Senku turned to look at him again. "Isn't that going a bit fast?” Gen asked.
“Do you not want to live together?” Senku frowned.
“Not what I'm saying. It's just that there is usually an order to these things. You want to live together but we haven't even clarified our relationship properly.”
Senku lifted an eyebrow. “But you just called yourself my boyfriend? Is that not clear enough?”
“Okay that's true, but people also usually date for a while before living together.”
“We aren't other people though. And we have already lived together for more than a year.” Senku reasoned. “Sure it was a while ago and we didn't have the label of a relationship but I was under the assumption that it worked pretty well. And - we also already did most of the things people do in relationships without the label, if I am not misunderstanding something.”
“You are not wrong”, Gen admitted. Gen's mind easily drifted to the memory of Senku's lips on his and a hand on his dick. Noup, not supposed to think about that. Not the right moment.
“If you want, we can definitely wait before moving together. It just kind of feels pointless to me. It's not like we don't know each other already.”
Gen sipped his tea and contemplated Senku's offer. “I haven't been to your place yet. So you'll have to take me on a tour before we decide.”
“If a tour is what you want, then a tour you shall get.”
The breakfast looked almost ready, so Gen set the table and sat down to enjoy the rest of his tea. It was just the right temperature and Senku apparently knew how to brew tea too, even though he had let it seep just a tad too long.
“Can we tell our friends about this now?” Gen asked when Senku set down the food.
Senku stiffened at the comment and grimaced. “I kind of texted Taiju already”, Senku admitted. “He was worried about me because we left quite abruptly so I thought this was the easiest option. Yuzuriha probably knows too.”
Gen laughed. “That's okay. I'll text Ukyo then.” Ukyo would be delighted he wouldn't need to hear Gen's complaining anymore.
“As long as you eat the food before it gets cold.”
Senku was never the type to be overly polite and he started to eat without waiting for Gen, which was useful, because Gen had an overenthusiastic text reciever bombarding him with questions. Eventually he managed to put his new phone down and concentrate on eating.
They ate and updated each other on what was going on in their lives.
Neither of them were in a hurry to move elsewhere. Eventually they ended up back on the bed to hang out because Gen's place didn't have other good places to sit at.
They managed to talk about mundane things for a long time but Senku could see Gen getting flustered. Sitting close together it was easy for Senku to accidentally bump on Gen's shoulder and brush his fingers against Gen's thigh. Senku almost made it a game to see how soon Gen called him out on it.
Gen didn't end up calling Senku out on it but he broke in another way.
“When is this later? You promised me something in the morning.” Gen tried to make himself sound like he wasn't close to whining out loud.
“I suppose it could be now. What do you want?” Senku asked him nonchalantly.
“You promised to take care of me”, Gen reminded him.
“True. - That is kind of vague though. You should tell me more precisely what you want.” Senku said, smiling infuriatingly.
“I want you to touch me.”
“Okay”, Senku answered. Senku moved closer to Gen and put his hand on Gen's knee. “Is this it?”
“Not quite”, Gen squirmed.
“Then tell me more”, Senku encouraged.
“I want you to touch me under my clothes”, Gen specified.
“I see", Senku smiled. Senku then moved his hand to Gen's stomach underneath his shirt. “What else?”
“Can you kiss me?” Gen asked.
Senku placed a chaste kiss on Gen's lips but drew back quickly.
“More, please more”, Gen pleaded.
Senku kissed him for a bit longer and a bit less chaste.
“What else?” Senku asked.
“Are you really going to make me say everything out loud?” Gen huffed.
“Yes”, Senku chuckled. “You said it yourself, we need to try to communicate better with words.”
“You're taking my words out of context”, Gen complained.
“Doesn't make your words untrue. - I want to know what you need.” Senku moved his lips to Gen's ear and whispered “I want to hear you tell me how much you want me. Tell me what you want.”
Gen drew in a breath and licked his lips. “Can you tell me what to do? I want you to guide me. You always know how to make me feel good.”
“How far do you want to go?” Senku asked.
Gen opened his mouth but stopped himself and then exhaled slowly. Senku waited patiently.
“It's been a while but I think I would liked getting fucked. - No, I do know that I want to be filled up. Can we do that?”
“Do you have the equipment for it?” Senku inquired gently.
“I have lube and the old glass dildo”, Gen confessed while looking away.
“Very good. You should be a good boy and get them for me. After that you may strip and get back on the bed.”
Good clear instructions. He could let Senku handle the thinking again.
Fulfilling requests like this had the tendency to make Gen more turned on. Handing Senku the lube and the dildo felt like relief. Senku took them from him and gave him a quick peck on the cheek.
Then Gen slowly undressed himself while Senku looked. Senku's eyes were just as intense as they used to be but Gen didn't feel the urge to hide yet. There was comfort in knowing Senku and excitement about what was going to happen.
Gen crawled on the bed until he was next to Senku. Senku was sitting down and Gen plopped his head on Senku's thighs. Then he curled up to his side to cover how hard he was just from Senku's words alone.
Senku ran his hand through Gen's hair.
“Lay on your back - and open up your legs”, Senku instructed while continuing to pet Gen's head.
Senku saw right through him.
Gen turned around without lifting his head. He had his knees up against his stomach but he slowly let his knees fall open. Gen's legs nicely framed the red and hard cock on his stomach. Gen's cock twitched when he saw Senku looking at the display with a small smirk on his face.
“You're so turned on and I haven't even done anything", Senku chuckled. “You are so pretty. How does this make you feel, love?”
“I feel like I’m an experiment for you to observe and play with. Part of me feels humiliated but a bigger part wants you to look at me more.”
“I got the feeling that you might like even the humiliating aspect of this. Am I correct?” Senku pushed.
Gen covered his face with his hands. “Yes.”
“For the record, I don't think there is anything to be ashamed of. You look so sexy and it is giving me a real ego boost to see you get so turned on by me. I was thinking that some other day I could tie you up. Make you an even prettier display for me. What do you think about that?”
Gen whined.
“Yes, of course you'd like that. We can get back to it once I figure out the proper knots”, Senku promised. “But what do you want next? I'll give you some options. 1) Climb on my lap and make out with me 2) I play with your nipples while you lay down and I might give you a handjob 3) you masturbate in front of me and I tell you how to do it better.
Gen's cock twitched at each of the suggestions, betraying him without words needed. The stretch of keeping his legs open constantly reminded Gen of his position. Even if Gen kept his eyes closed he knew Senku was watching each of his reactions.
Gen lifted his hands from his face. “I want to make out with you.”
“Good decision. You may close your legs. Get up so you can sit on my lap. Be mindful of my clothes though, I don't intend to take them off and I would like to keep them decent.”
The reminder of Senku being fully clothed made Gen's cock twitch again and he moved quickly to climb onto Senku's lap. He sat down carefully with knees bracketing Senku's thighs and tried to avoid letting his cock touch anything.
Senku lifted his hand to Gen's cheek and placed a short chaste kiss on his lips. Gen felt like he was melting.
“I love you”, Senku stated. His smile was more gentle now.
“And I love you”, Gen responded. Gen carefully lifted his both hands to Senku's shoulders and brought their foreheads together.
Before Gen could try to reattach his lips to Senku's, Senku spoke up again. “I want to make sure you know that I want to make out with you too. But it's been a while and having you in my lap is already quite a lot so I might have to push you back at some point.”
“That's okay, darling”, Gen assured and pecked Senku's cheek. “Are you okay with this position or can I make you more comfortable in some way?”
“You're okay. Just don't suddenly grab at me and we should be good. I'll let you know if I need space.”
Gen hummed agreeably and kept his hands lightly on top of Senku's shoulders.
Senku leaned in slowly. Their lower lips touched briefly and then Senku stopped. Gen didn’t dare to move. He could feel Senku's breath tickling his lips and the anticipation was killing him.
Senku playfully nipped at Gen's lower lip then dove in like he was starved. For someone who got easily overwhelmed, Senku didn't really do lazy making out.
One of Senku's hands continued to gently stroke Gen's cheek while the other found Gen's waist. Gen let out a small whine as the lower hand found Gen's hip and Senku’s squeezed just the right amount.
Senku’s lips were a bit chapped but they slid smoothly against Gen's. Gen matched Senku's pace and the kisses turned a bit slower. Gen felt warm and safe in Senku's arms. Gen thought that he could continue like this all day.
Then Senku's hand that was previously on Gen's cheek moved to grab the back of his head. Senku pulled lightly on Gen's hair and Gen tipped his head accordingly. It felt good to be manhandled and Gen let out a moan.
While Gen moaned, Senku slipped his tongue in Gen's mouth. Senku's tongue was hot and demanding and Gen just relaxed his mouth and let it happen. Gen pushed against Senku's tongue and their tongues circled one another.
The hand on Gen's waist pulled him closer to Senku and his cock was now trapped between their stomachs. Senku pulled Gen's hair again and Gen unconsciously arched his back and simultaneously thrust his hips towards Senku.
Gen moaned again and his cock twitched in a way that Senku probably felt too as they were pressed so close together.
Senku pushed Gen's shoulder lightly and they separated. Senku's lips were shiny with spit and his face was pink. Senku was breathing hard.
“Kissing you feels nice but - huhh, also quite overwhelming. Feeling you twitch against me was hot.”
Gen's face felt hot.
“You can stay there but I need a bit of a break from intense sensations.”
Gen backed away a little and focused on evening out his breathing. His neglected dick kept on twitching.
“You're leaking”, Senku said in awe.
Fuck. Gen had probably ruined Senku's clothes by rutting against him.
“Don't worry about my clothes. I think they're fine. Besides, it's sort of my fault if they got stained.”
Then Senku took hold of Gen's dick lightly and used his thumb to get the drop of precum on it. Then Senku brought the finger to his own lips and licked while holding eye contact with Gen. Gen felt his whole body shiver.
“Tastes pretty much like I expected it to. Your blush on the other hand is quite spectacular. Did you want some too?”
Did Gen want to taste his own cum? Not really, but he suddenly had a strong urge to lick Senku's hand clean. Gen nodded enthusiastically.
Senku laughed and brought his thumb to Gen's face. Gen held the hand gently and licked the finger. It wasn't enough so Gen took the finger in his mouth and started to suck on it.
Senku pulled his hand back way too soon and Gen whined again.
“I know you wanted to continue, love, but I really can't handle that right now”, Senku explained.
That sobered Gen up quickly. “Sorry, I got too into it”, Gen said with a worried tone.
“That's not it, I'm just telling you my limits. Thank you for respecting them.”
Gen leaned his head on Senku's chest and Senku started petting him gently.
“Of course. Thank you for telling me”, Gen answered. Gen continued to lean on Senku and Senku continued to pet Gen's hair for a long minute. “Is it weird that just the feeling of your hand on my head is making me really hard?” Gen asked embarrassed.
Senku chuckled but answered quickly, “Not weird, I've been teasing you since morning and you're still naked on my lap. Is this your way of asking to get on with it?”
“This is really nice and I'd like to continue but my dick is also aching to get some friction and I would feel awful if I started to hump on you while you're being sweet”, Gen admitted.
“You humping on me would definitely be a sweet sight but maybe more so on another day. You're right, we should get on with it. - Can you sit up a bit more?”
Gen did as asked.
“Now, do you have any towels or sheets you would not mind ruining?” Senku asked. Gen nodded. “Would you mind getting them for me?” Senku continued.
Gen was up on his feet before he even realized it. Gen got out a few towels of different sizes and returned to Senku.
“Very good”, Senky said and laid a towel on top of his lap. “Get back here and put your hands over my shoulders like you would hug me.”
Gen felt that it was easier to settle closer in Senku's lap with the towel protecting Senku's clothes.
“I'm going to stretch you out now”, Senku whispered in Gen’s ear. Senku's hands moved to Gen's ass and squeezed. One of his dry fingers circled Gen's asshole and put a light pressure on it. “Is that what you want?”
Gen moaned in answer.
“Give me words, love”, Senku reminded, while gently massaging the ring of muscles on the outside.
“Yes, I want your fingers in me.”
“Try to stay still and just feel what I give you, is that something you can do?” Senku asked.
Gen tried to nod in answer but Senku didn't proceed at all. Oh right, he wanted answers with words. “I'll try.”
“Good. That's all I ask. I want you to be vocal and tell me how much you like it. I'm sure you can give me valuable feedback on how to please you just the way you want it.”
This time Senku didn't wait for an answer. He lubed up his fingers and brought them to Gen's hole. Senku teased the opening while Gen tried his hardest not to move against the fingers.
Slowly but surely Senku pushed in his middle finger and began pumping it in and out. With another hand he poured in more lube every now and then without stopping the motion of his hand.
“Uhh, your fingers are wider than mine. Feels good. Can I have more?” Gen pleaded.
“Good way of vocalising your thoughts. I suppose I can give you another one.”
Senku breached Gen with two fingers and Gen could feel his breath hitching.
“Can you kiss my neck?”
“Yes I can, love.” Senku smiled and started leaving wet kisses on the column of Gen's neck.
“Hhnn - so good. I love being close to you.”
Senku started to suck on Gen's neck and Gen couldn't help but whine. He started to rock against Senku's fingers without meaning to. It all just felt so good.
Senku stopped giving the hickey. “Remember what I asked you?”
Fuck, he got too into it again. “I was supposed to be still”, Gen muttered embarrassed.
“It is okay, you tried but you forgot because it felt good. Isn't that right? Can you try to be still again?”
“Yes.”
“Good. I'm also going to add the third finger. You're taking it really well even though we haven't done this in ages.”
“Yeah, I may have been using the dildo regularly," Gen confessed. “I-, I kept imagining that it was you because you made it and all. Because you always made me feel so good. I felt awkward using it while I was avoiding you but I couldn't help myself.”
“You were allowed to use it. I made it for you to use the way you wanted to use it. I'm not judging”, Senku assured. “Did it feel good when you used it on yourself?”
“It was never as good as when you fucked me with it”, Gen cried out.
Senku kissed Gen's shoulder
“But even if it wasn't quite the same, it was still good. It felt like you made me cum even when you weren't there. Even when I was avoiding you”, Gen continued.
“Look at you being so sentimental”, Senku chuckled. “Thank you for telling me. Wanna see if it feels the same as you remember it?”
“Yes!”
Senku slowly dragged his fingers out of Gen and wiped them on the towel. Then he lubed up the glass dildo and lined it up against Gen.
“You ready?” Senku asked.
“More than ready. Please do it.”
Senku pressed the dildo in. Slowly but surely the dildo went deeper and Gen felt full.
Gen was breathing hard against Senku's neck while he held onto Senku's shoulders. Senku raised one hand to hold Gen by the waist and the other kept the dildo embedded deep inside Gen.
Being close to Senku. Being held by Senku. Being filled by Senku. It felt amazing. Gen was close to crying.
“Now remember, try to be still. I want to fuck you slowly”, Senku whispered.
“Okay”, Gen whispered back.
True to his word, Senku started to fuck the dildo in and out of him with a slow pace.
Senku's movements dragged out small noises from Gen that he couldn't have kept in even if he tried. But Gen managed to stay mostly still. He leaned heavily on Senku and he felt like he was melting again.
“You sound like you're enjoying yourself. Tell me, do you like the way I fuck you? Am I giving it to you deep enough?” Senku asked.
“Hnnn, I- I like it”, Gen panted. “It feels like - uhh - feels like you're avoiding my prostate though.”
“You are being so smart today, would you like me to change that?”
“Yes, fuck my prostate.”
“Like this?” Senku asked and suddenly Gen saw stars in his field of vision.
“YESSS, so good - ahhh. I'm- I'm having trouble not moving against you”, Gen cried out.
“Beg me to let you rut against me. Beg me to let you come,” Senku demanded.
Tears began streaming down Gen's face due to the intense pleasure. “Fuck, fuck, fuuck. Please, puh- lease let me rut against you. Please fuck me deep and let me come”, Gen begged.
“Do it”, Senku encouraged. Senku was panting lightly against Gen's next. “Just let go. I'm going fuck you until you come. Don't try to hold back the noise.”
Gen keened and started to rut against Senku and push back against the dildo. Senku hit Gen's prostate with every thrust now and it felt incredible. Gen was never able to reach his prostate this well.
Rutting against clothed Senku felt shameful but then again, Gen always felt a sense of shame when others could see his neediness. But Senku didn't judge, he encouraged. Senku actively liked seeing him needy.
Stimulation on his cock felt wonderful after having neglected his cock for so long. The thought that Senku could probably still feel his dick through the layers was exciting. Gen's cock ached.
Gen let out a loud groan and after that the noise just kept coming. It was like a dam broke open. Gen was making sounds he hadn't known he could make.
“I - fuck - love you so so much. I don't think anyone else could make me feel like this”, Gen cried. The thought felt stupid, but getting fucked in Senku's arms felt safe and comfortable and that was more important than all the sensations combined.
“I love you too. You are making the loveliest sounds. And you must be so close judging by the way you're shaking already. Let go for me Gen, I've got you”, Senku murmured.
Gen hadn't even noticed the shaking because he could barely keep up with the sensations. Hand on his back. His chest against Senku's. Senku's panting against his neck. His hard dick pressing into Senku’s stomach. The dildo nailing his prostate with brutal efficiency.
The feeling of tipping over the edge had been building for a long time. At Senku's encouragement Gen let go. He came with a shout and he could feel his limbs turning into noodles.
Senku kept on fucking him with the dildo until Gen had to tell him to stop. Senku then laid down and moved Gen onto him. Senku's other hand kept the dildo in while the other wrapped around Gen's head and started petting his hair.
“You were so good today, love”, Senku whispered in his ear. “I hope you enjoyed yourself as much as I did.”
Gen burst into hysterical laughter, “I don't know if anything can ever top that. I feel like I’m still having an out of body experience.”
“I'm glad I still got it then”, Senku mused softly and kissed the side of Gen's head. Then Senku smiled fondly. “I forgot how endearing you are after sex.”
For some reason Gen felt like crying again, so he did. Senku slowly took out the dildo and tossed it aside on the towel. Then he hugged and petted Gen with both of his hands. “I'm here love, can I help in some way or is this the good kind of crying?” Senku asked.
“I don't know. What you're doing feels good. I don't know where this is coming from.” Gen continued to cry but it didn't feel as bad as it could have.
“It's all right", Senku assured.
“I guess I'm just really glad and relieved that you're here again and that you want me. I hated avoiding you", Gen confessed. Now the crying was winding down a little.
“Well, I'm very glad and relieved to be here too. And I won't let you avoid me anymore either. I'm sure we can figure out this relationship -thing", Senku promised. "I believe in us.” Then Senku proceeded to kiss the side of Gen's head again.
"That is way too sappy. I can't handle this much sappiness right now", Gen lamented.
Senku turned contemplative. “Hmm, I guess that means that I should not bring up marri-.”
With lightning fast movement Gen covered Senku's mouth with his hand. “Stop! - right there. You are not allowed to speak anymore. We are absolutely not having that kind of discussion now. I'm still sex drunk. You cannot say that kind of things to me when I'm like this. I will pretend I didn't hear it."
“So no proposals after sex, got it.”
“I will literally murder you if you say one more word along the same train of thought.”
“No you won't, you love me.”
“I'm an idiot”, Gen complained, “but yes I do.”
After a while Gen continued, “Do you need to do anything today? Because I don't think I'm going to be able to move for quite a while.”
“I think since the morning my only agenda for today was to do you, so… Plan accomplished? I'm all yours for the rest of the day.”
“Thoroughly accomplished. I say we're going to nap now. I don't care what time it is. After the nap you're going to help me clean. And then we find something to eat. Sound good?”
"Sounds good." Senku moved a blanket on top of them and kipped them over to a better cuddling position. Senku stole a few kisses along the way. Gen sighed happily. The tears had finally stopped when Senku got around to joking so he was getting calmer too.
Gen burrowed himself against Senku's chest and closed his eyes.
“Sleep well, love”, Senku said and kissed the top of Gen's head.