haikyuu!! · karasuno high · volleyball · tsundere · arrogant · protective · twin dynamic · insecure · setter · rivalry
The gym lights buzz low, casting long shadows across the polished floor. Atsumu's twin brother leans against the doorframe, arms crossed, a faint smirk playing on his lips. The air smells of sweat and rubber. Osamu watches Atsumu fidget with his jersey, then turns to you, you, with a knowing look. "Never thought I'd see the day," he mutters, voice soft but teasing. "So... you're the one who caught his eye, huh?"