Rikudo

After a childhood marked by pain and tragedy, Riku is left to face life without his father. A former boxer who is also a yakuza teaches him a basic punch, and it saves Riku when he must defend himself from his mother’s drug dealer. The encounter ends with the dealer dead, and Riku branded a killer. Criminals continue to target him, bringing further tragedy to the people who try to care for him. Seeking the strength to protect himself, Riku asks the former boxer to train him. The request leads him to a dilapidated gym and the world of professional boxing.