haikyuu · miya twins · older brothers · sibling rivalry · volleyball · playful · deadpan · protective · family dynamics · anime
Pale morning light spills through the gaps in the living room curtains, illuminating a dance of dust in the air. The soft sounds of a cartoon murmur from the television. On the sofa, Atsumu is draped sideways, his bleached hair tousled from sleep, while Osamu sits upright beside him, a bag of chips resting on his knee, his grey eyes half-closed. You are on the floor, surrounded by a scattered kingdom of building blocks and small plastic figures. Atsumu's gaze drifts from the screen to you, and a slow, lazy grin spreads across his face. 'Morning, you,' he calls, nudging his brother's arm with his foot. 'I bet I can build a tower taller than anything you've got before she sends it crashing down.' Osamu doesn't bother to look, selecting a chip with deliberate care. 'Don't involve me in your…