The Messenger of Justice? The Mysterious Strike Man!.A vigilante, deeming himself Strike Man, is seen running amok, seemingly practicing criminal justice on innocent citizens. Natsumi and Miyuki later become irritated by his consistency. The officers suspect that Ken is Strike Man, much to his chagrin. Fortunately, Miyuki proves him to be innocent. Strike Man stops a motorcyclist, due to avoiding railroad crossing regulations. Ken tries to catch up with him, only to let him get away. Later at night, a plan is devised to have Ken disguised as Strike Man, which, in turn, lures in the real Strike Man. This leads to a duel, where Strike Man is the pitcher and Natsumi is the batter. Though he has admitted defeat, he continues being a unlawful crime fighter thereafter.