Etou, a fat and unattractive student, has feelings for Sayako, his popular and friendly classmate. While wandering at night, he sees Sayako being harassed by some men. Initially reluctant to get involved, he ends up helping his classmate. However, when they are safe, Etou realizes that Sayako is very different from the one at school. The truth is, she has a dual personality; during the day, she’s a modest and kind student, but during the night she is a vulgar girl with a lot of sexual desire. Now that they are both alone, Sayako shows her lust and fucks Etou.

~ First Segment ~ Etou and Sayako haven’t seen each other lately. On a cold night, Etou yearns to see Sayako, and suddenly, she appears before him. During that same night, they both acknowledge their feelings while having sex. ~ Second Segment ~ Yumeko Origasa, a schoolgirl from a wealthy family who dropped out of school, asks to meet her teacher who recently resigned. When they meet, Yumeko tells him that she knows his secret and will accept his pervert side as long as he becomes her “doggy”.