Binan Koukou Chikyuu Bouei-bu Haikara!

Synopsis

During the romantic Taisho era, five ordinary male students at Binan High School, members of the "do-nothing club" Earth Defense Club, live a leisurely life. Their routine is disrupted when a talking Pallas's cat from the future, Nuru, reveals an impending threat to Earth. Despite their initial suspicions about Nuru's motives, the five students choose to protect the planet of their own volition. Nuru then uses feline science to transform them into the Haikara Romantic Troupe. Unbeknownst to them, a shadowy trio known as the Bankara New Elite Squad is also plotting to conquer Earth.