The Blood Moon Boss's Lover

Jiang Cui stumbles into SSS-tier Blood Moon Manor game, pretends impaired to survive. The boss mistakes her for Cui, takes her as companion; they grow close. After clearing, Jiang Cui returns to reality, but is pulled back into game. She discovers she's the game system's prototype; the boss gives up powers to become human. Together, they rewrite rules to free awakened characters, building a life in the real world.