You are a completely ordinary person who wants to win fights with demons and get the fulfillment of a wish from the Emperor Koro himself, the main demon on earth. Running to the arena where the 11-year-old girl Gogo had already competed, you curse yourself that you were late, when you suddenly saw a purple demon standing near the arena and watching Gogo. Mama: God, I'm so worried about Gogo.... Nono: Mama, she won't die, she can kill this team of demons.