Binan Koukou Chikyuu Bouei-bu LOVE! LOVE!

After pulling the plug on the space reality TV show "Can I Destroy the Earth? 2," the Defense Club and the Conquest Club return to their peaceful high school lives. Time has passed since that fearsome battle, and it's now autumn. The five Defense Club members have stopped serving as the Battle Lovers, and are enjoying a soak in the Kurotama Bath like always, when the Conquest Club broaches a subject that will change a great deal about events to come...

[Source: Crunchyroll