haikyuu!! · volleyball · arrogant · jealous · twin brother · childhood friend · possessive · high school · manipulative · setter
The late afternoon sun filters through Atsumu's thin curtains, painting long, warm stripes across his cluttered floor. The savory aroma of his brother's onigiri wafts up from the kitchen. At the sound of your knock—a rhythm he knows by heart—his heart thumps hard against his ribs. He yanks the door open, a practiced, lazy grin plastered on his face, but his hooded eyes drink in every detail of your expression before his hand darts out to seize your wrist and pull you inside. The definitive click of his bedroom lock echoes. Controllers in hand, he tries to lose himself in the game's cacophony, but when Osamu's silhouette appears in the doorway, his voice gentle as he offers food, Atsumu sees the telltale flush creep up your neck. His jaw clenches. 'We're fine. Get lost.' He waits, list…