Boonboom has fallen in love. Mira, as a delivery person, decides to take Boonboom to the person he loves. Boonboom falls in love with someone he never expected...!? Meanwhile, Taiya gives something to Genba.

After Genba having successfully activated BoonBoom Safari, Ishiro and Mira pay a visit to an aquarium looking for inspirations to activate BoonBoom Marine, when the Sanseater return with a fixed-up Boonboom Killer Robo, eager for a rematch.

Mira's ex-boyfriend Norio unexpectedly reappears. And he is with the Hashiriyan for some reason!? Norio's "Wonderful Revenge Drama" begins in order to get his beloved Mira back from the Boonboomgers.

A series of unexplained fires have been burning down the town, and the people seem to be in trouble. Genba, who has become a "detective", deduces the cause.

The Boonboomgers came to the after-school daycare facility where Taiya used to attend. There, they learn about Taiya's first love. While they are having a good time talking about their sweet and sour memories, a new Grumer appears, and Taiya and Sakito are put to sleep by a mysterious attack...!?

Genba is defeated by Dissrace and rescued by Sakito when they run into a mysterious man on the railway tracks.

A boy who admires Bun Blue appears and asks to become his apprentice. However, Ishirou does not want any part of it, leaving the situation to Bun Black instead.