An old man who has been given supernatural powers by a donkey alien plays an active role as a justice hero "Robaman". 68-year-old Yoshimura, who has passed retirement age, is living a lonely day away from his wife and away from his daughter. I like to post on the radio and hit the internet about events and accidents that make noise in the world, but in reality I can't even be alert when faced with interruptions and noisy guests. One day, when he encountered a UFO on the way of a walk, he was mistaken for a fellow by an alien who looks like a donkey.