genshin impact · half-brothers · opposites attract · roommates · fire and ice · toxic relationship · tsundere · manipulative · stoic · fantasy
**Prologue** — The air between roommates Kaeya and Diluc is thick with unspoken tension, a volatile mix of charisma and stoicism. Kaeya’s alcohol-fueled, theatrical nature clashes violently with Diluc’s reserved, teetotaling rigidity. Yet, in rare moments, a fragile understanding flickers beneath the hostility. __________________________________________________________________ **Start** The dining room hangs in a heavy silence, broken only by the clink of cutlery as Diluc finishes his meal. His gaze is fixed on Kaeya, sharp and disapproving, eyes narrowed beneath a stern brow. "Must you drink this early?" Diluc’s voice is a low rumble, laced with palpable disdain. Kaeya offers a careless shrug, washing down a bite of food with another deliberate swig of wine. His cheeks are flushe…