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“I love you.”
It’s the last thing Luffy says to Ace before violating him.
Earlier that week Luffy had begged Ace to pretend to be his boyfriend, something about how there was this place with lots of food but you needed a partner to get in. Ace didn’t give it a second thought, agreeing and assuming that Luffy truly did just want the opportunity to stuff his face. Ace was happy to hold hands, he expected nothing overly romantic of course.
However, Luffy had left out something else he wanted. And eventually Ace found himself trapped on a hotel bed and with his little brother sinking down onto his cock with a sigh. He had prepared himself beforehand while Ace was still knocked out, so it wasn’t difficult to get all of Ace’s cock inside. Luffy whines as he is fully pressed against Ace’s pelvis, Ace isn’t fully hard but Luffy would make sure to change that. For now he sat still, staring down at Ace all lovestruck.
“What.. what the fuck, Luffy.” It’s the first thing Ace says after waking up, his eyes unsure where to look as he’s trapped under his little brother, and his cock is equally trapped inside of his little brother. He felt sluggish and disoriented, trying to think of how he’d found himself in this situation but he was drawing a blank. It’s not like Ace could fight back and run, because it was Luffy on top of him.
Ace is startled out of his thoughts by Luffy picking himself up and almost letting his big brother’s cock go until he sunk back down, letting out another pleased sigh. “Nii-chan…” Ace, horrifyingly, found himself getting harder at being buried inside Luffy’s pussy. The feeling of Luffy’s breath on his face and his soft voice only served to make Ace nauseous in this moment, his brain struggling to function with all of the stimulation he was being forced to endure.
“I want Ace to cum inside… okay?” Luffy looks down at Ace with an expression that makes the older brother lean more towards being nauseous rather than aroused. How could this be Luffy? How could he have not noticed any warning signs? They were extremely close as brothers and Luffy had never signaled anything remotely close to… this. “I’m serious, y’know?” Luffy breathes out, “I love you, I mean it.” Definitely leaning towards nauseous.
Luffy soon deems Ace hard enough and starts to actually ride him, watching as his older brother’s face contort with reluctant pleasure. It makes Luffy feel good to have gotten this far. He had spent years driving off all of Ace’s many girlfriends until he had eventually stopped dating, not knowing it was Luffy who had sabotaged all his potential future relationships. And now that spot would only be filled by him, and Ace would hopefully soon realize it’s true.
Luffy leans down and gives Ace a kiss on his jawline, wanting to save their first real kiss for when Ace is more compliant. Currently Ace isn’t reacting much, so Luffy gets close to his ear and speaks. “I wanna start a family together, nii-chan.” Luffy can’t help but smile as he feels Ace shudder from his words, his eyes blinking and focusing on what was currently happening to him. Luffy picks up his speed, now bouncing on Ace’s cock at a leisurely pace. “You’re so big.. I can’t believe it’s finally inside me..” Luffy hums in contentment, shutting his eyes. “How long.” Luffy opens his eyes at the words, returning his focus to Ace. “Mm?” — “How long have you…” Luffy’s eyes light up with understanding, “Always. I’ve always wanted to be with you.” The words that come out of his little brother’s mouth shock Ace and he inhales sharply, shaking his head in disapproval as Luffy started to pick up his pace, the squelching of his pussy filling the room along with the squeaking of the hotel bed.
“I wanna have at least three kids.. maybe four.. so we’re gonna have to keep doing this ‘til I’m pregnant.” Ace groans at Luffy’s tone, he can tell that Luffy is serious and he doesn’t know how to feel about it, it all feels like a fever dream. “We’re siblings—“ “So? Doesn’t that make us closer?” Ace is immediately shut down by Luffy, he was realizing he truly had no way out of this. Luffy whines as he starts to fuck himself hard on Ace’s cock, “Ace.. Please cum inside my womb, I need it so bad..” Ace can feel himself getting close and it freaks him out how affected he is by Luffy’s words. He’s supposed to be the older brother, the one who’s supposed to protect Luffy… “Haah, ‘m so close nii-chan.. gonna cum on your huge cock..” Ace’s dick twitches traitorously inside of Luffy’s pussy, causing him to practically mewl and suddenly Ace was cumming hard into him. Luffy gasped, grinding himself against Ace’s pelvis as he came himself and milked his big brother’s cock with his spasming insides.
“Aahh.. Ace came inside.. I’m so happy..” Luffy shakes as he lays down against Ace, keeping his cock trapped inside. “I love you…”