The story takes place in Kanagawa High School, which is full of youthful atmosphere. Gion Kenji (voiced by Chiba Shoya) is a freshman who has just entered this school. By mistake, he met a boy named Ishimizu Sumaki (voiced by Adachi Yuto). Although Ishimizu Sumaki has a tall and strong figure, his personality is particularly cowardly and timid. Not long after entering the school, he was bullied by senior classmates. Kenji is petite, but his temper is very explosive. Thanks to his help, Ishimizu Sumaki barely escaped. Kenji also got the opportunity to join the rugby club and became a rugby reserve player. In the team, Kenji met many like-minded partners, the oldest and most respected Akayama Shuya (voiced by Hosoya Yoshimasa), the smiling good man Hachioji Mutsu (voiced by Oosaka Ryota) and Oharano Kogo (voiced by Ono Kensho) who has rich game experience and a very arrogant personality.