Kazama Shunnosuke is a fool and a pervert, but a well-meaning young man (?) who loves health, martial arts, and eros. One day, he’s suddenly tasked with standing in as the health teacher at St. Versus academy, a former all-girls martial arts school he himself attends. At this academy, where bodies are weapons and physical prowess is everything, even growth and development management is part of the school rules. In other words, under the guise of school regulations, Shunnosuke now has the daily duty of conducting so-called "body measurements" — essentially glorified harassment. To make things more complicated, many of his childhood friends also attend this academy. Time has been kind to them — they’ve grown into healthy, strikingly voluptuous women, their once-familiar bodies now teasingly matured and almost defiant. Faced with these daring figures, Shunnosuke, who’s somehow earned the nickname “The Nude Maker of the Nurse’s Office”, can’t hold back: “Damn it! How the hell did they change like this without me noticing?! You're really all grown up now, huh?!” If he could dominate this academy, the pinnacle of the martial arts world, through “body measurements” — or rather “intimacy” — he’d basically have conquered both the martial arts scene and the school itself! “This is bad… I’m way too fired up for this!” With clenched fists and overflowing passion, his energy causes the pages of the idol photo book he’d been flipping through to flutter. Bathed in the golden glow of the setting sun streaming through the curtains, he swears a firm oath to the hot rod of determination in his pants.