The Earth Defense Club is back together after a time-stopping monster appears at the bath house. Who could be behind this new sinister attack?

Two twins, Haruhiko and Akihiko Beppu, transfers into Binan High School, attracting the attention of overweight, beauty-obssessed student Tsukurou Osou. After charming most of the school, the twins, also known as Galaxy Vepper, transform Osou into a Tofu Monster, which is soon defeated by the Battle Lovers.

With the Student Council studying abroad, the Defense Club is asked to present a reading to children. Tagaru Katari, a member of the Speaking Poets Society, is upset at this development as he thinks that only someone with passion can do this job. Thanks to a suggestion from Yumoto, the group decides to do the story "Jizo and the Hats" for the children. But when Vepper transforms Katari into the Mic Monster, it's up to the Battle Lovers to keep the children safe and save the play.

A hairy situation arises when a new set of twins arrives from Italy. Will the Beppu twins finally get rid of Yumoto once and for all?

Fed up with Munakata's practicing in the Volleyball club, Shuzo Oka quits. But as Munakata finds a new club ally in Yumoto, Shuzo becomes jealous and is transformed into the Volleyball Monster. When he finally sees the truth, Shuzo and Munakata vow to not graduate until they finally participate in a Volleyball tournament. Meanwhile, we see a little more of a connection between the Beppu twins and a certain former Battle Lover.

The rift between Io and Ryu has double in size, and the Earth Defense Club faces a brand new challenge. Can they survive as a trio?

The Earth Defense Club decides to throw a Christmas Party at the bathhouse, and Gora invites the Beppu Twins. Will everyone get their Christmas wish?

New Years celebrations come to a halt when a frosty foe appears!

After the Beppu Brothers' shocking revelation, the Earth Defense Club gives them the cold shoulder. After a month and a half of being snubbed, the twins set out to ruin Valentine's Day.

A theme park from Yumoto's past is closing, and the Earth Defense Club treats him to one last trip down memory lane.

The wood chopping-obsessed Gora has gone missing, leaving wood unchopped! Yumoto and his "senpais" search fervently for Gora, but can't find a single clue as to his whereabouts. A dejected Defense Club returns to the bath to relax, where they receive an unexpected visitor...

Love takes center stage in the final confrontation between the Beppu Twins and the Earth Defense Club!