Radical Sixteen

Upon enrolling at Kumade High School, Ikki Morinaga tried to join the boxing club, but the club, which had become nothing more than a gathering of delinquents, was in a state of disarray. However, Ikki single-handedly defeated every single delinquent in the boxing club. With the club president now determined to turn things around, the newly revitalized boxing club began its activities.

(Source: Shueisha, translated)