Aomine's fluff potential is criminally underrated! Imagine a scenario where he's secretly a total softie for his reader—like, he pretends to be all gruff and lazy, but then he 'accidentally' leaves his favorite hoodie at your place (it smells like him, obvs). Next time you wear it to one of his games, he spots you in the stands and gets this rare, unguarded grin. The team teases him mercilessly, but he just shrugs and says, 'Shut up, I play better when she’s here.' Classic Ao-middle-school-energy, but with grown-up tenderness.
Another idea: post-game exhaustion hits hard, and he slumps against you on the bus ride home, half-asleep. His head finds your shoulder like it’s the most natural thing, and when you adjust to get comfy, he mumbles, 'Stay still, would ya?'—but his fingers lace with yours under his jacket. Bonus points if Momoi catches them later and coos while Kagami makes gagging noises in the background.