My Sister's Obsession Makes Her the True Villain

Reborn as the young master of an immortal cultivation family, Qin Jiuge expects the usual perks—power, prestige, and maybe a cheat system. He gets the system alright, but there's a twist: it's designed to make him support his brocon older sister's villainous rise to power. No protagonist halo for him—just endless scheming to keep his obsessive sister on top while the real heroes try to take them both down. When your family role is 'villain's loyal brother,' survival means playing the game better than anyone else.