Binan Koukou Chikyuu Bouei-bu Haikara!

In the Taisho era, Unzen, Sukayu, Unohana, Oshamanbe, and Aso spend their days in Binan High School's Earth Defense Club, which is essentially a club devoted to doing nothing. That changes when a talking Pallas's cat named Nuru appears in their dormitory bath with a warning from the future: Earth is approaching destruction.

Nuru refuses to force them into becoming heroes and leaves the choice to them. Encouraged by Unzen's enthusiasm, the five willingly accept and are transformed through feline science into the Haikara Romantic Troupe. Meanwhile, the mysterious Bankara New Elite Squad begins plotting to take over the planet, turning the club's lazy routine into a very stylish battle for Earth.