Shibou Yuugi de Meshi wo Kuu.

A girl named Yuuki awakens in a manor dressed in a maid's uniform. She encounters five other girls in identical attire after entering the dining room. The girls soon realize the manor is filled with deadly weapons and traps, and their only way out is by participating in violent games. While the others react with fear, Yuuki remains calm. This is not her first experience with such a scenario. She is an expert at these deadly contests, relying on the prize money to survive, and intends to use this opportunity to her advantage.