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Mizuki's face flushes a pretty pink when they process the nature of Mafuyu's request. "Mafuyu- I-I uhm."
"Do you need me to repeat?" Despite the dull tone and look on her face, Mafuyu's cheeks also had a red glow to them. Seeing Mafuyu's embarrassment helped Mizuki a bit with theirs, but their heart still raced and threatened to beat out their chest.
"N-No, I heard you," Mizuki stammered. "I just wasn't expecting that."
They must look stupid, sitting on the edge of their shared bed, embarrassed just from the thought of topping their partner. Mafuyu stared, intensely. "Haha... Yeah, I want to, I just didn't expect you to want me to be... rough or to be topping, honestly. I thought Ena was the only bottom here-" A stray colored pencil flies through the open door as Ena passes by, a sour look on her face as she throws the projectile at Mizuki. "Fuck off Mizuki, Don't act like you don't like bottoming for Kanade."
The flush on Mizuki's face seems to get a bit brighter, despite this information already spread between the four of them. The colored pencil ends up hitting Mafuyu instead, and the glare she sends to Ena could have set an orphanage on fire.
Clearing their throat, Mizuki tried to shake off the embarrassment and redirect the conversation back to Mafuyu's request. Mizuki wasn't used to talking about such... mature topics. Normally when something of an adult nature happened, it just happened.
"I'm happy to do it Mafuyu," Mizuki breathed out, trying to steady their breathing. They hadn't noticed it becoming heavy. They can do this, it'll just take self-confidence. They know Mafuyu would never judge, but it was hard not to be self-conscious when Mafuyu was so good at anything and everything she did.
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"Just tell me if I'm doing anything wrong, yeah? Colors or safeword?" Mizuki says, trying to set some rules down before she fucked the living shit out of their partner. Judging from the way their stomach turned, the embarrassment of being in control wouldn't ever go away. Maybe Mafuyu just didn't want to be in control for once?
"Colors. Red, Orange, and Green," Mafuyu replied. Mizuki finally allowed themself to break eye contact and look at what Mafuyu was wearing. She had opted to wear almost nothing when crawling into Mizuki's bed, clad in only a loose shirt and underwear. The way her underwear hugged her hips perfectly shot a wave of longing up Mizuki's spine, but now was not the time for dysphoria.
When Mizuki turned around after turning the light off, they swore they saw Mafuyu's eyes glowing for a second. Crawling back into bed, Mizuki discovered that Mafuyu had shed her shirt in the few seconds it took to turn off the light. They ignored the way their length twitched in their pajama pants, instead opting to run their hands over Mafuyu.
Mafuyu seemed impatient and went to tug their pants down, but Mizuki decided that that was no good and stopped the behavior in its tracks. "Stay still if you want any chance of taking me tonight," They commanded, voice a bit unsteady. Mafuyu didn't show any signs of hating this though, so they just continued.
They waste no time in straddling Mafuyu, connecting their lips in a searing kiss. One hand trailed down Mafuyu's side, lightly scratching her with their nails. They could tell she was enjoying this from the way her breath hitched whenever their nails pressed down harder.
Mizuki's jaw slackened to bring their tongue out to play, but Mafuyu's mouth stayed closed. "Color?" They mumble, waiting for an answer before trying anything else. Mafuyu barely manages to say green before Mizuki's tongue is in her mouth, mixing their saliva and germs.
Mafuyu let out a small noise when Mizuki's unoccupied hand entertains itself by roughly grabbing her breast. Mizuki might be breathing heavier than Mafuyu at this point, worked up by the foreplay. Their cock strains against the fabric of their pants and presses against Mafuyu's stomach.
Her hand slips from where it was pressed up on Mizuki's hip to their dick, and they hiss. "Keep your hands to yourself, didn't I tell you that already?" They nip at Mafuyu's bottom lip as punishment and are rewarded with a moan in return. Her hands move to her sides, not quite sure of what to do with them.
Mizuki moves their hips off of Mafuyu and breaks the kiss to finally pull her underwear off. Mafuyu is panting, and she doesn't seem to be embarrassed by the string of arousal that connects her underwear to her soaking crotch. That was a good sign, and it emboldened Mizuki.
Mizuki went to run their lips over Mafuyu's neck, wanting to tease her for just a bit longer. Mafuyu squirms and it brings a smile to their face. Their tongue comes out to play, and they teasingly lick a stripe up Mafuyu's neck. Quickly, one of Mafuyu's hands laces itself through the roots of Mizuki's hair and tugs them closer, and they decide to ignore this in favor of nibbling at her neck. Eventually, they get tired of this and suddenly they're reminded of their neglected cock, aching and twitching.
Hastily tugging their pajama pants down, they ask again: "Color?" "Green. I'm fine, just get on with it already," Mafuyu says way too quickly, and with a bit more attitude than Mizuki likes. They don't get their pants all the way down before they're lining up with Mafuyu, impatient to be inside of their lover.
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"Are they okay in there? Mafuyu doesn't normally sleep in Mizuki's room," Kanade says, cuddling with Ena in her room.
Ena snorts, knowing exactly what they're doing in there.
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Mizuki roughly thrusts up into Mafuyu, ready to be completely engulfed in the passionate flames of their loving. They don't give her any time to adjust before they start hammering into her. Her gasps and moans are intoxicating to Mizuki, and they want nothing more than to make her scream.
Her insides are so warm, clenching and throbbing around their cock. Mizuki changes the angle every few thrusts until their cock hits something that has Mafuyu loudly whimpering into Mizuki's chest. Mizuki runs a hand through her hair, giving it a playful tug. "Mafuyu~ Look at you, so fucked out for me. Only I get to see you like this right? You're mine." Well, Ena and Kanade were in the polycule too, but that might make the dirty talk a bit boring.
"Y-yours, please!" Mizuki doesn't know what the hell Mafuyu is begging for, but they have a feeling that Mafuyu doesn't know either. The wet slap of their hips echoes against the walls of the room, and Mizuki has no doubt that Ena is probably pissed as hell trying to sleep. The thought makes them smirk, and they put more force into their thrusts to see how loud Mafuyu could get.
"F-Fuck, I'm-" Mafuyu's words are cut off by a moan, and she's clenching down around their cock, insides trying to suck them in further. They slow down, to make sure they don't stop the fun too early before speeding back up and overstimulating their partner.
"Mizu-" Mizuki leans in for a kiss, shutting her up effectively. They continued thrusting, aiming for Mafuyu's G-spot once again. Her eyes are shut tight, and her hands are gripping into the sheets.
"Mafuyu, how do you want it? Do you want me to cum inside you? Please say something~" Mafuyu looked too out of it to answer though, so Mizuki decided to just go for it.
With a few more thrusts, Mizuki stilled as they filled Mafuyu with their cum. The feeling of hot seed filling her up sent Mafuyu over the edge, clenching down on Mizuki and milking them for all they're worth.