After a stint in prison for tax evasion, Kazuyoshi Ishii meets a tragic end when hit by a truck, only to awaken in the inert form of Kei Ichinose, a high school girl in a coma. Transitioning from leading K-1 to navigating high school life, he rediscovers karate, blending MMA expertise with youthful tenacity in a tale of unexpected reincarnation and martial arts prowess.