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

Mira Shifuto's about to get married to a man she doesn't want to when she's suddenly whisked away by a deliveryman.

Ishiro still won't acknowledge Mira as a Boonboomger as the team has to deliver classified documents to a foreign ambassador.

The Sanseater are greeted to the arrival of Wayway Yarucar, an elite member of the Yarucar race, as the Hashiriyan prepare for Spindor's arrival.

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

After saving a child from getting hit by a truck, Mira is arrested by Officer Akuse and brought in for questioning by the International Space Agency.

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.

Genba has his first solo delivery job for the ISA. Worried about him, Mira decides to tag along, when the Sanseater attack the duo.

Taiya runs into a certain familiar Engine and takes on the job delivering him to his partner.

Mira works part-time on a curry restaurant she has loved since childhood. However, business is not as booming as it once was so the other Boonboomger decide to investigate.

The Sanseater blame the Boonboomger for Mad Rex's death as Taiya surprises the team with a new Boonboom Car, the Champion Carrier.

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.

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.

Mira goes out on her first solo delivery while a clock-themed Hashiriyan tries to stop everything that moves.

Taiya makes a special delivery to an old friend who inspired him to become a deliverer in the first place. Meanwhile, Cannonborg, another team captain arrives to assist the Sanseater in taking over Earth.

The Boonboomgers are afflicted by a mysterious phenomena that leaves them apathetic, while Genba approaches Itasha of the Sanseater with unknown intentions. Meanwhile, Cannonborg completes his secret weapon to counter Boonboomger Robo.

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.

Mira's childhood friend grows jealous of her as the Hashiriyan hatch a plan to send out two monsters at once.

Jou wants to become a Boonboomger, but Taiya rejects him, saying he doesn't have what it takes just yet.

Taiya reveals his real intentions to form the Boonboomgers, which is to participate in the "Big Bang Grand Prix", the biggest and most important race of the entire universe, while fighting the Hashiriyans was not in his original plans.

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!

Shirabe is to explain the Boonboomgers to the head of ISA. Meanwhile, Taiya and the others have to fight a familiar Grumer. What's more, something extraordinary happens...!? The 3rd LAP is about to begin.