The Amami family, Hassaku, his older sister Mao and younger sister Airi. Their parents founded a school to foster love between the students but they passed away in an accident. Now their aunt Mei has taken possession of the school and forced Mao away so nobody could challenger her position. Mei's plan is to turn the school into a Mecha-con school where girls are trained to be sold as the perfect brides for wealthy men. To do that she needs to convert the school into an all girl's school.

Murakami Teruaki's new project is finally starting! This new production of Murakami Teruaki, greatly known for his savage eroticism unrivaled in depictions of high-speed piston-like action and facial expressions accompanying orgasm, is, of all things, in the genre of "Younger Sister Moe"! It has been decided that Murakami Teruaki will turn Moonstone Cherry's "Imouto Paradise!", a game with the concept of "masturbate to cute girls," into an anime with the help of his direction!! The lewd, cute younger sisters will now assertively bear down on you through the anime.