- Timid honor student Yuki (Kengo Kora) joins Ebisu High School's boxing club, aspiring to the raw power of his childhood friend Kabu (Hayato Ichihara), who's a bad boy boxing prodigy.
Despite Kabu's laziness, he racks up a string of winning bouts through his natural talent for the sport. He may not listen to what anyone says, but he's willing to give it his all for the people close to him, including his coach.
Bullied as a child, Yuki applies his no-nonsense character to training day in and day out through a sheer desire to become stronger, also gaining support from best friend Kabu.
Watching over the two boys as they develop are school English teacher Yoko (Yu Kashii), who reluctantly becomes the boxing club's new advisor; Maruno (Mitsuki Tanimura), who has a crush on Kabu and thrusts her way into the role of his manager, and boxing club coach Sawaki (Toshio Kakei), who harbors a secret past.
Under Sawaki's guidance, Yuki gradually builds strength, moving one step closer to undefeated high school rookie Kabu.
Fate leads the two friends to become rivals. A battle that will affect the course of their friendship awaits...