Ishiro trails Jou, thinking his overly serious policeman persona might just be an act when a toilet-themed Hashiriyan starts forcing the truth out of people. Meanwhile, Taiya has to deal with a new foe.

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.

Sakito makes an offer to Taiya to join the team. Meanwhile, Sakito's partner Byun Diesel is an old acquaintance of Bundorio and wants to meet him again, but Boonboom refuses and the past between them is revealed.

At the Hashiriyan's request, Sakito starts trying to get rid of the Boonboomgers! Taiya asks him, "Why did you abandon the earth?" But...!? Will Sakito turn out to be a friend or foe!?

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.

Summer! Camping! Tent Grumer!? Tent Grumer interferes with children who are enjoying camping in the mountains. Then, Taiya and the others challenge the newly born "Boonboom Leon" to a battle!

A new monster has appeared on the ground! The Boonboomgers fight as usual...but for some reason, they decide to play a game of baseball. Boonboomger vs. Hashiriyan is a blazing hot battle, and "Boonboomger Robo 119", a Cho Bakugage Gattai robo, plays a big role in the battle!

Spindor is given the offer of the Earth's soccer league being part of his own Big Bang Soccer league, which Sakito and Genba take issue with.

Spindor is curious about Santa Claus and wants him kidnaped and brought before him.