Sakigake!! Gokudo Yankee Gakuen 2

Original title: 魁!!極道ヤンキー学園 2

Yuki and her boyfriend Makoto seem like an ordinary student couple, but in fact, they both have a shocking secret: their families are gangsters and they have been dating without revealing their true identities to each other. When Yuki's father suddenly dies, Yuki has to become the third generation leader. Then an incident triggers a conflict between the two unions...