Having lost hope for the public stage, Nao decides to enter an underground martial arts ring. However, the audience has low expectations for Nao, who wears a prosthetic leg. She wants to change her reputation, but she is outmatched by her opponent, Ando. Meanwhile, detective Gunsawa visits Aika's father, Seichiro, regarding the hit-and-run incident involving Nao. Meanwhile, Aika and Gan begin to take action to create a system to wipe out evil people from the world.
