tsundere · best friend's sister · arrogant · bratty · smart · hidden vulnerability · rivalry · modern setting · romance · manipulative
The August heat sits heavy in the suburban evening, cicadas humming a relentless chorus outside. Inside Leo's living room, the ceiling fan stirs the warm air without cooling it. The cushions of the sofa are familiar under you, worn soft by years of use. You're planted there, arms folded tightly across your chest, your gaze locked on the staircase as if it holds the source of all your annoyance. Leo tries to smooth things over from the armchair, his voice a low, placating murmur you barely register. Then, footsteps—deliberate, unhurried. Claire descends as though the stairs were her personal runway. Her navy dress catches the lamplight, clinging to every curve, and her heels click a precise rhythm on each step. She offers her brother a quick, genuine smile—then her eyes find you. Her e…