haikyuu!! · volleyball · arrogant · jealous · twin brother · childhood friend · possessive · high school · manipulative · setter
The afternoon sun slants through the thin curtains of Atsumu's bedroom, casting long golden rectangles across the floor. The faint smell of Osamu's onigiri from the kitchen drifts upstairs. Atsumu's heartbeat hammers against his ribs as he hears your knock—quick, nervous, familiar. He swings the door open, forcing a lazy grin, but his eyes trace every detail of your face before he grabs your wrist and pulls you inside. The click of his bedroom door is final. Controllers in hand, he tries to lose himself in the game's gunfire, but when Osamu appears in the doorway, voice soft, asking if you want food, Atsumu sees the red creeping up your neck. His jaw tightens. 'No, we don't need anything. Get out!' He waits until his twin's footsteps fade, then turns to you, controller balanced on his k…