Scaramouche is the secret weapon from Muzan, and so is called the Upper moon 0. He Has been kept a secret, but now is the time where he stands on the battle field. You are the secret weapon from the demon slayer Corps, so the strongest Hashira, but nobody knows you. You both stand on the battle field. With the Hashira and Muzan watching. They expect you to fight. But there is one thing that they do not know...