Ryōtarō Shiba, an ordinary high school student, relocates with his family to a new housing development. There, he encounters neighbor Nozomi Egawa, recently returned from New Zealand. Nozomi astutely identifies Ryōtarō's latent exceptional reflexes and visual acuity – abilities he never realized he possessed. She engineers his entry into the high school boxing club by forging a resume that falsely brands him a boxing prodigy.

Initially reluctant and devoid of boxing interest, Ryōtarō uncovers a startling natural aptitude for the sport under Nozomi's persistent influence. He forges a distinctive, knockout-heavy boxing style, surging rapidly through competitive matches. This swift ascent captures the attention of professional trainers and scouts. Amidst his success, Ryōtarō harbors occasional doubts about a possible supernatural influence from Nozomi, especially as she unfailingly delivers a specific pre-fight mantra: "Don't worry. Have confidence. If you set your mind to it, you can do anything."

His core motivation evolves from personal goals to fulfilling Nozomi's dream: witnessing her brother represent Japan in boxing at the Barcelona Olympics. This external purpose becomes central to his athletic journey. His rivalry with boxer Nanjō introduces significant competitive dynamics that further shape his development. The narrative traces Ryōtarō's path from high school competitions through Olympic tryouts, marking his transformation from an average student to a nationally ranked contender.

Interactions with teammates and opponents illustrate his deepening integration into the boxing community. His character arc is defined by a progression from skepticism to dedicated athletic commitment.