Unstoppable gals get out of control! The sex life of an otaku student couple develops rapidly due to the influence of gal schoolgirls. An inexperienced, gloomy couple is being developed by a group of extroverted, bitchy gals...! The fate of Akiho, the boyfriend who has never had sex, and Suzune, his girlfriend, changes dramatically when they accidentally meet their childhood friend Sayu, who has become a full-fledged gal. The two have their first sexual experience at the hands of the gals, and discover the melting pot of pleasure. Suzune sees her boyfriend being taken advantage of by the three gals, and she makes up her mind to push Akiho down...!?