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After graduating from school, Iwashita and Horio, members of a group of bad boys, get jobs at a local cleaning company.One day, at the school building they went to for work, they meet up with their homeroom teacher at the time, Ms. Ryoko, for the first time in five years. As usual, they are fascinated by Ryoko-sensei's voluptuous and voluptuous advances, and decide to use all their wits to see if they can somehow devour her body, so they decide to send a fake class reunion postcard to Ryoko. .