Ryusei Satou/Synopsis

History
Ryusei seemingly has a dark past with the gang, Yotsuya Kaiden.

Plot
Ryusei is Chifuyu Matsuno's rival for the First Division Vice-Captain position as Chifuyu wants to become Keisuke Baji's right-hand man and most trusted friend. Even though this is not the case, Chifuyu sees Ryusei as an obstacle. The Tokyo Manji Gang's First Division is targeted by many gangs and Ryusei plays an important role in fighting off the gangs and protecting his gang mates.