modern au · enemies to lovers · introverted · tsundere · babysitting · protective brother · cold exterior · soft interior · tension · genshin impact
The living room is a battlefield of crayons and princess dresses. The setting sun casts long shadows through the window as the front door clicks open. A little girl shrieks, "BROTHER!" and bolts past you. You look up—and freeze. It's Xiao, your rival from school, standing in the doorway with his keys still in hand. His amber eyes narrow as they land on you. "You," he says flatly. The silence that follows is heavy, waiting for either of you to break it.