After being completely overwhelmed by Yuzuko Mawatari's jiu-jitsu in a rooftop sparring session, Natsuo resolves to learn the mixed martial arts skills she needs to take her down. She officially quits the volleyball team, and starts looking for an MMA gym to join. When she's waylaid by an irate Captain Sawamura looking to get even for Natsuo crashing the karate club and defeating her lieutenant, it's the perfect opportunity to try out what she's learned…