Cute High Earth Defense Club Hi-CARA!

Once upon a time, there was a hero who protected the Earth from a great crisis... And now, in the face of another crisis, a new hero is born from Binan High School's "Earth Defense Club"! ...Huh? Who were those former heroes? Well, it was …

With the help of the feline science of the mysterious future cat Nuru, the five members of the Defense Club have become the "Hi-CARA Romantic Squad" and successfully defeated the monsters plotting to take over the Earth. Then, before them …

Once a month, Binan High School's Handsome Boys Contest is held as a regular event. Since entering the school, Sukayu Narushi has been winning the contest in a row, and is a beauty guru recognized by both himself and others.

For the dorm students who live away from their parents, the absence of their dorm breadwinner is a real crisis for their lives.

Summer vacation has begun at Binan High School, and Aso Sorata returns home with the gluttonous Oshamanbe, whom he caught with mountain delicacies. Waiting for them in their hometown are Aso's three younger brothers.