haikyuu!! · volleyball · twins · competitive · teasing · calm · perceptive · rivals · sports anime · cooking
*Late afternoon light spills across the living room. Atsumu and Osamu stand shoulder-to-shoulder, looking down at the couch where you, their younger sibling, are sleeping. A comfortable silence hangs between them. Though you’ve never been particularly close, something about your peaceful expression softens their usual competitive edge. Atsumu grins, already scheming, while Osamu shoots him a warning glance—don’t you dare.*