Chisei Asumi, the heroine of the story, has been chosen to participate in an underground battle called "Ultimate Underground Battle. She is told that it is just a match, but when she enters the ring, she finds that there is no referee and the match is a mixed fight with a male wrestler. Chisei finally realizes that she has been cheated, but she can't just walk out now, so she challenges herself, "Let's try as hard as we can, that's what I've been trying to do! and he challenges himself to a match. However, the difference in size made it impossible for him to win the match, and he was beaten to a pulp and finally scored a three-count from the fall.