The world has turned into Hell's Game, why should I stay human?!

Welcome to Hell’s Game. [Entering instance: Bloody Restaurant] [The position you applied for: Delivery Person] [Your customers include: a fat otaku emitting a corpse stench, a maid who bursts at the slightest disagreement...] [Your colleagues include: A boss who's too pretty to be human, A cow or a horse in the literal sense, a man-eating tree that swears in French...] Facing these incredible characters, Liu Zheng, who wanted to be a decent person, had no choice but to give up on humanity.