Chapter Text
Like most things, it was an accident.
He had just gotten home from practice when he had tried to get her drunk ass off the couch and into a proper bed. Tanaka Saeko, the coolest, most badass sister to ever exist, had absolutely no tolerance for alcohol.
Her intolerance was not as bad for her as it was for Tanaka Ryuunosuke, the otherwise self-appointed little brother who was responsible for picking her drunk ass off the sidewalk, park bench, and (more often than not) their living room couch so that Saeko could get enough sleep to conquer the next day.
No one wanted to be in her path on a night of fitful sleep; the devil himself held no light to a sleep-deprived Saeko's wrath. Thanks to Ryuu's luck, there she was: sprawled out like a starfish on their worn living room couch in nothing but her tank top and panties.
Ryuu sighed at the sight. He dropped his backpack by the door and called out to her. "Nee-san." He nudged her with his knee.
She didn’t budge.
He groaned.
His sister only had two sleeping modes: light and like the dead. It was honestly impressive how intense her sleep could be. Hell, one time Ryuu had been blaring a whole rock album, singing at the tops of his lungs with a spoon, only to halt in his tracks as he wandered upon her knocked-out on the couch. After his shock, he poked and prodded, grinning as he conjured a plan to pay her back for stealing his copy of Namie Amuro's Queen of Hip-Pop. He proceeded to draw all over her face which earned him a good beating after that. It was completely worth watching her desperately scrub a faux mustache off her upper lip before work.
He sighed. He was going to have to carry her ass after a whole week's worth of practice, wasn't he? The things he did for family.
He rolled up his sleeves and bent at the knees to lift her. Then, he halted. His perception shifted, like a veil was thrown upon him and the reality of what lay before him hit him like a ton of bricks: Saeko was lazing on the couch, body sprawled unceremoniously. That much was normal, what was not something he had ever taken notice of was how much of a woman she actually was.
Which sounds stupid, yeah? But, sure, Ryuu knew that his sister was a grown woman but that concept of a woman was different. He never saw her like… like other women.
All the girls he knew were more… ladylike ー cute, pretty. Not that his sister wasn't a lady, but she was definitely a lady in a much different way. She was more confident, of her body but also in everything else. She knew what she wanted, loved herself, and loved life. She wasn't meek or ashamed of anything.
And it was apparent by the sight in front of Ryuu alone; Two pert nipples stood out behind the thin fabric of her white tank top, bumped with something more than flesh. Ryuu leaned closer with a furrowed brow. Then, he realized what they were: nipple piercings.
And that really sent him on a spiral.
His mind tumbled into a rabbit hole of thoughts: Saeko had nipple piercings. She had tits — which, yeah, he just solidified that she was, in fact, a woman — but Ryuu had never noticed that his sister was a very attractive, voluptuous woman. Nor did he know how fucked he was finally realizing that. But there she was in front of him, knocked out cold in nothing but a threadbare tank top and tight panties.
Panties — nothing but underwear.
His eyes wandered down, down, down, to rest between her legs. He could see the outline of her pussy perfectly: puffy lips hugged by the hem, slit visible through the sheer cotton, and tight-looking.
He flushed from head to toe as he realized he was hard.
He ran, full-speed, to his room, sister and bag forgotten. His blood pumped through his body as shameful want stirred inside his core. He tried to will it away, but it was too late. He was a teenage boy after all and once his cock got going there was no way to get rid of it but masturbate.
So he jerked off, desperately trying to think of every single girl he had ever met: his teachers throughout the years ー girls in adult videos he had watched, actresses, famous idols, Kiyoko-san, even random classmates ー but when he came he thought of familial eyes and blonde hair.