In "My Home Hero," Tetsuo Tosu's life takes a grim turn when he discovers his daughter, Reika, has become a victim of domestic violence. His suspicions point toward her yakuza boyfriend, Nobuto Matori. Determined to find the truth, Tetsuo investigates Nobuto and his associates, only to uncover evidence suggesting Reika is far from the first to suffer from Nobuto's violent tendencies and that she faces an even darker future.
While searching Reika's apartment, Tetsuo is caught by Nobuto, leading to a confrontation in which Tetsuo kills him. With his wife's help, Tetsuo hides the body to avoid retaliation from the yakuza. Their situation worsens when they learn Nobuto is the son of the syndicate's leader. As the prime suspects in Nobuto's disappearance, Tetsuo and his wife must use every ounce of their resourcefulness to protect Reika from the yakuza's relentless pursuit.