Mira who was a Boonboomger member is recognized and enjoyed by the public. But somehow her hands were handcuffed. The person who restrained Mira was Shirabe Saibu, an investigator from a certain organization.

Jou is the new member of the Boonboomgers. Ishiro, who is "too serious to trust a police officer who is too serious...", decides to follow Jou to find out what his "secret face" is. Meanwhile, there is a powerful new enemy on Earth.