Perverto is just a regular 17-year-old... with the unavoidable nickname, "pervert." Unlike his namesake, he's actually quite naïve when it comes to sexual matters; his first and only youthful romance having ended terribly. To escape his bad reputation, he transfers to a new school for a fresh start. But on his first day there, he's falsely accused of groping a girl named Hongdan on the subway. The real pervert who framed him is a math teacher at his new school, too! The teacher is an expert at getting away with perverted behavior...and he's targeted Hongdan for more gropes!