The year is 1979, and Miyamoto Takumi's life suddenly changes when he meets a mysterious young man named Tokio at a park in Asakusa. The young man says, "I've come from the future. I'm your son, Tokio." Thinking it's some kind of bad joke, Takumi doesn't believe him at all. However, Tokio can predict the future, make strange machines, and shows Takumi strange powers. Takumi, who at first doesn't pay any mind
