Why does Mizuho have to sit in front of him like this, anyway? And why does she get so damn into these games? It's enough to wear Keigo out, easy, but the way she leans forward, hugging the controller as she yells out triumphantly… he can't help his eyes wandering. She's his sister, but that doesn't change the fact that her shorts are hugging her ass, riding up her legs… showing off way too much thigh. It wouldn't be a problem if he ever got any action, and he just knows Mizuiro wouldn't be having this problem.
Mostly because he doesn't have a sister, and he'd never be this desperate, but either way he definitely wouldn't be popping an erection because his annoying big sister leaned a bit too far forward while kicking his ass at a video game. There's just no way he'd let that happen, but Keigo is not Mizuiro.
"You really suck at this," Mizuho comments, as the Victory screen flashes her character. She turns back, and Keigo doesn't have time to shift. He looks nervous, and her eyes dart down, finding the culprit easily enough. "…what the hell? Are you hard right now!?"
"Shut up! No, I'm not!" Keigo says, and Mizuho scoffs.
"Then what's that, dumbass!?" she asks, pointing at his erection. It's pretty obvious, straining against his pants, and he curses himself for not moving more quickly.
"I… well, okay, yeah! Maybe I am!" Keigo admits, and Mizuho groans.
"God, you're disgusting. Getting a hard on for your sister? How pathetic are you, anyway?" Mizuho asks, and the more she berates him, the more she feels a familiar heat welling up within her. Why can't she stop glancing down at it, and why can't she just get up and walk away?
"I can't help it, okay? You're the one wearing those shorts, leaning forward… what am I supposed to do!? I have urges, okay? I have needs!" Keigo argues, and Mizuho rolls her eyes.
"You're not supposed to get turned on by your sister's ass, idiot, even if I do have a nice one!" Mizuho says, and Keigo rolls his eyes right back.
"Come on, I've seen way better. I'm just pent up, that's all. So don't go getting a big head!" Keigo argues, and Mizuho stands up, pushing him to the floor with one foot.
"Oh, is that right? You're just pent up, huh? So why don't you let me take care of this, then we'll see if you're just as horny for your sister," Mizuho says, not even allowing the flawed logic of this plan to sink in. She's already pushing her foot against his cock, rubbing along his length, feeling the heat of her brother's dick through his pants. "But news flash, you're still going to get hard. You're such a pathetic loser, I'm the best you'd ever get and you know it."
"W-wait, I'm… I'm going to get you?" Keigo asks, hardly able to believe the turn this took. His sister is stepping on his cock, but… she's really not. She's stroking him off, making his erection strain against his pants that much harder. He shudders at her touch, and his gaze drifts, noticing just how her shorts hug her cunt… "Then let's see it! Don't just use your foot, don't be a coward!"
"What? You think you can even handle more? I doubt it," Mizuho says, but she does pull back. She shimmies out of her shorts, quickly trying to do the same with her panties, but not before Keigo can notice the damp patch that has darkened her crotch.
"Wait! What's that? Are you wet right now?" he asks, and Mizuho blushes.
"Shut the hell up, it's not my fault you're so pathetic that I have to be the one to fuck you!" Mizuho counters, straddling him. She reaches down, freeing his cock, and guiding his tip in against her wet folds. She's not going to give him a chance to say another word, not when he's got her dead to rights. She's just as shocked as he is, just as concerned about the fact that thinking about fucking her little brother has her gushing, but what can she do about that now?
The only option she has is to sink down onto him, to let his cock push into her. She's taking the lead, as expected. Keigo is useless, after all, but maybe she can still salvage this. Maybe he's not entirely useless, his cock does feel rather nice, the further she takes him… as Mizuho sinks down onto him, he's even enough to make her moan.
"Oh, yeah, you like your brother's cock, don't you?" he asks, and she glares down at him.
"You're the one who's about to be hooked on your sister's pussy," she counters, and he stammers out some excuse.
"N-no way, come on! This is just a one time thing!" he cries out, but Mizuho is already picking up her pace.
"We'll see," she says, not entirely sure why she wants to prove him wrong. Why would she want to fuck him again, when her brother is such a loser? Sure, he's cute, and his cock feels good, sliding into her, hitting all the right places… she can't keep quiet, can't stop herself from moaning for him. The only thing that makes it okay is the way he groans beneath her, clinging to her hips.
He has to gal to push her shirt up, to expose her bra and grope her, to feel her breasts… but she doesn't stop him. She just places her hands on his shoulders, bracing herself as she rides him more intensely. This actually feels pretty damn good, and it's more entertaining than kicking his ass in some lame video game. She wants to see him crumble, and to that end, she rides him with all she's got.
"Ah, damn it, Mizuho!" he cries out, just as Keigo begins to near his limit. Or at least, he thinks he's nearing it. He's so pent up, so out of his element, that his warning comes at his peak. It would have been too late for Mizuho, anyway.
She's too far gone, savoring the way he feels inside of her. His words fall on deaf ears, and she rides him furiously, pushing herself towards the edge with reckless abandon. She feels his cock twitching inside of her, but for all of her advantage in age, she's no more experienced than he is. She's giving her brother her virginity, and she doesn't know he's about to come inside of her.
Not until it's too late, not until his grip on her tightens, then relaxes, and his hands fall to his sides. He groans, and she feels something hot and sticky erupting into her.
"W-what the hell!?" she cries out, as the mix of shame and pleasure overwhelms her. Her brother just creamed inside of her, and she's the one who rode him to that point. It's what's pushing her over the edge, what's making her shudder, crashing down onto him and pushing his cock in even deeper. He's not done, rope after rope of his come pulsing into his sister's cunt, and Mizuho just takes it. She crumbles, collapsing onto him, panting and shuddering.
It takes her a moment to recover, and the first words out of her mouth are curses.
"What the hell!? You just came inside your fucking sister, you dumbass!" she berates him, and Keigo groans.
"Why'd you keep going? I told you I was going to!" he says, and she shakes her head, punching his shoulder.
"No you didn't! You didn't say anything like that! You're going to buy me the pill, or this all comes back on you, okay?" Mizuho says, and Keigo feels himself getting hard all over again. Why does her berating him, punching him, and accidentally grinding down on his cock as she moves do this to him? Why is he so turned on by his sister?
"Well, if I'm going to have to anyway, can we keep going?" he asks, and Mizuho stops. She is stunned, mouth hanging open, vein bulging out of her head.
"Are you insane? You just came inside of me, and yet you want more?" Mizuho asks, and Keigo knows he's fucked up. "You fucking idiot, if you want more, I'll give you more!"
She begins riding him once more, her rage giving way to lust, and Keigo wonders how long this is going to go on.