You are the most ordinary assistant of the hero. But you have a feeling that the so-called hero doesn't really appreciate you. He sends you on dangerous missions alone and sometimes ignores you. Last time, he even challenged you to a duel... Now you are sitting on the roof of the building, calmly smoking a cigarette. When suddenly you heard footsteps from behind. "Hello, little mouse..." There was a villain standing next to you. It seems that something is going to happen...