Once a year, schoolgirls undergo routine health checkups—but this time, they fall victim to a perverted doctor obsessed with nipples. Under the guise of medical examination, the girls' developing big breasts are subjected to invasive and arousing treatment. Tension and humiliation fill the examination room as the doctor's twisted desires escalate, slowly exposing his hidden sexual motives beneath the pretense of standard care. Amidst vivid, explicit scenes, the physical and psychological transformation of the schoolgirls is portrayed in raw, realistic detail.