Ring ni Kakero

Takane Kiku and Takane Ryuji are siblings whose father was a renowned boxer. Kiku, who has inherited his boxing talent, attempts to train Ryuji to follow in their father's footsteps, but Ryuji resists and is often bullied. The siblings move to Tokyo, where Ryuji meets Kenzaki Jun, a boxing prodigy who helps him develop an interest in the sport. Through this experience, Ryuji begins learning unconventional techniques and faces unusual opponents, eventually rising to become one of Japan's top junior boxers.