Throughout his entire existence, Makunouchi Ippo has endured endless bullying, leading him to yearn for change. However, despite his desire, he lacked the bravery to pursue his aspirations. That is, until the infamous boxer Takamura Mamoru rescues him from an attack and brings him to a nearby gym for recovery. In the stimulating and supportive atmosphere, Ippo is struck with admiration, but his lack of self-confidence hinders him. Noticing this, Takamura boldly places a photo of Ippo's bully on a punching bag, leading Ippo to channel his frustration and find motivation for the first time. With a burning desire to support his mother and better himself, Ippo begs Takamura to teach him boxing, and although hesitant, Takamura ultimately agrees. But, Takamura sets an impossible task for Ippo, giving him only one week to complete. Regardless, Ippo remains resolute and trains tirelessly, setting forth on the path to becoming a boxing champion.