A.N. This is kind of mature ok? I'd say it's a lime. Not a strong one, but for all the young ones out there, please be warned. This isn't for you my dears!
The end of the war had brought a huge sense of relief upon everyone, him included. With the extreme development of his powers, Ichigo had found that his reiatsu was to strong, to heavy, for him to continue living in the living world, so he'd decided to move to the Soul Society permanently. However, before that, he wanted to finish school- there wasn't much left anyways. Urahara had spent days designing a very strong, slightly dangerous pill that would lower Ichigo's reiatsu, enough for him to enter the living world without accidentally killing anyone. However, with his weakened reiatsu fighting could become difficult and Urahara had stated clearly not to go into a shinigami state as long as he was in the living world, and so Rukia herself had volunteered to go with Ichigo every week to attend school until he finished.
She'd been given exclusive permission by Kyoraku-soutaicho himself, and Ichigo found that he had no complaints. It was hard to get used to the idea of being without his sisters and crazy father, but found a huge comfort in Rukia being around. They had started a relationship after the war's end.. but while people in the soul society mostly knew about it, it wasn't like his entire class would. There was a strange sense of mystery and thrill that came with having your lover pretend to be a normal classmate during the day. Though he'd never admit that openly.
However, right now he was just a little bit hot and bothered. When he got home from school, he kicked off his shoes furiously, face flushed as he went up the steps to his room. He knew his sisters wouldn't be home- Yuzu had a crafts club after school and Karin had soccer practice. His father was still working in the clinic, so the house was empty for him to scold Rukia and not worry about people butting in.
When he got to his room, he went in, closing the door behind him and tossing his book bag on his bed, glancing over in annoyance at Rukia. She sat on top of the futons stacked in his open closet, her legs hanging over the edge, still in her uniform and those annoying black thigh high socks. She was shuffling through her own book bag, and glanced up at him when he entered the room wordlessly.
He glared at her as he moved to his desk, emptying his pockets of his keys and his wallet as he scolded, "Rukia, do you know how dangerous that was? Somebody could have seen-!"
"Oh, please," she was still looking through her bag, smirking lightly now, "I barely touched you."
A vein throbbed on his forehead as he looked at her, half annoyed, half pained, "Rukia, I'm serious.."
She stretched lightly, leaving her bag discarded in the closet before ushering him to come closer with a finger. "Ichigo."
He moved across the small room until he stood in front of her. She reached out and grabbed his hand, pulling him closer, she kissed his fingertips. "Relax.. nothing is going to happen even if people here find out.."
He moved closer then, seemingly hypnotized as he tilted forward and pressed a soft kiss against the corner of her mouth, pausing when she let go of him, her hands sliding down her thigh to grip the edge of her black, thigh high sock, his gaze hot on her as she pulled it down, down, down, and tossed it to the floor.
That bare, smooth leg moved up to wrap around his waist, her hand tugging his to rest against her other leg, still clothed and she murmured, "Pull this off, will you..?"
His brain had seemed to shut down, his hand moving automatically to grip the edge of the sock and yanked in straight down off her leg in one move, tossing it somewhere behind them as his hand gripped her thigh, pulling it up to wrap around his waist like the other. Her arms wrapped around his neck and pulled him in for a hard kiss, dragging her tongue across his lower lip as he groaned. His hand inched up her thigh, sliding across her hip, savoring the feeling of soft, thin lace against her skin, his finger curled around the thin strap before sliding under it, making Rukia sigh against his lips.
She dragged her hands down from his neck to his chest as his mouth moved from her lips to her jaw, trailing kisses down to her neck, his hands moved up to fumble with the buttons of her shirt, pushing it and the pink strap of her bra off her shoulder, biting and sucking at her skin.
"Oh, Ichigo.." she sighed, her hands sliding up the back of his shirt, running across his bare skin as if to set it on fire. His hands moved in the opposite direction, sliding up the sides of her waist to her chest, pushing her now unbuttoned shirt to the side, his hand smoothed down the strap of her bra teasingly.
He groaned against her lips as he felt her hands move from his back to the front, running across the hard contours of his chest, his skin burning at her touch. Her legs gripped his waist in a death grip, his blood pounding in his veins when she sucked gently on the skin behind his ear, "God, Rukia.."
She pushed off the futons then, causing Ichigo to step back with her in his arms, her legs wrapped around his waist, he merely stood there, to engrossed in their little french kiss, before moving back until his knees hit the back of his desk chair, he fell back into the chair with a grunt, his hands gripping the back of her thighs as the sudden pressure of Rukia's weight on his lap spiked pleasure through his body.
She rocked her hips against him, grinding him slow and painful, making him pant, "-Rukia!"
"Mm.." she pressed another soft kiss against his lips, smirking suddenly as her lips grazed his ear as she murmured breathlessly, "Kurosaki-kun, please fuck me."
There was no way he was going to survive the next hour alive.