Meet Ichihashi Jirou, a sex drive scholar at St. Orgies' Private Academy. He offers his dick and semen to help with the Perversion Department's,
practicums in exchange for all sorts of perks. Being a virgin, however, he's very picky about who his first partner will be. Right next door to Jirou is the Maezono household, a famous family of perverts made up of a single mother and her four daughters.

When the eldest daughter, Chihiro, catches Jirou masturbating, the entire Maezono household soon finds out he's a virgin. A highly esteemed family of perverts like the Maezonos can't possibly leave a defenseless virgin like Jirou unmolested for long! Now that they've got their sights on him as a partner for perverted acts... IT'S FUCK OF BE FLICKET! Jirou now has to choose his first partner among the five attractive ladies of the Maezono family!