Ryouka Yotsumoto

Ryouka and Ayumu have been childhood friends, Ryouka turns out to be quite good at karate, but one day she got into trouble because she discovered that the men's karate team had cheated, she also beat them, and that's how the team karate decided to get even with her. One day, she and her childhood friend are attacked, when they were about to be defeated, a boy appears to protect them, this is how Ryoka begins to leave with Yamato.