Sena Kobayakawa manages to enter Deimon High, the same school his friend Mamori Anezaki is currently attending. On his first day, all goes well until he runs into three bullies known as The Ha-Ha Brothers. As they drag him into the Football club to beat him up, Ryokan Kurita arrives and scares them away, thinking they wanted to join the Football club. Sena asks to be the team manager for Deimon Devil Bats and becomes friends with Kurita...