Revealed to have been possessed by Haindo, Rin must now keep a promise to the Boonboomgers to join them in the World Grand Prix and the secret of the Boonboom car

While the BoonBoomgers confront a Hashiryan who doesn't possesses a piece of Haindo's power, they reunited with Bun Orange candidate Rin Myoujin who reveals that she is more than she appears

The Boonboomgers, are continuing on fighting the Hashiryans at the same time continuing their lives, when one person, Rin Myoujin who transforms to the female Bun Orange, can't help but look at them, especially at Genba, as he feels suspicious about her being his female double. Kazusa Okuyama (Patren 3gou) guest stars as Rin Myoujin/Bun Orange, this takes place after episode 39 and before episode 40

The Boonboomgers are surprised when a Hashiryan appears at the interrogation room at HQ to turn himself in, Genba wants to believe him, but Sakito knew that it was an effect of a piece as he tries to protect Genba from the horrible truth.

Puppet Grummr and the Sanseaters is trying to make the Boonboomgers their Puppets but when Genba and Mira were trying to fight him, he made them switch bodies, what did Genba and Mira learn when their bodies are switched