Kyoka, a tomboyish and serious teacher, has a secret she cannot tell her students. That is, she is fighting evil as the Pretty Guardian Sailor Silphid. One day, a monster named Takuminov appears in front of Silphid with a hammer. Silphid fights Takuminov, but he escapes. The next day, Kyoka is captivated by a pornographic magazine she confiscated from a student, and for some reason, unable to control her sexual desire, she indulges in masturbation in the classroom. In fact, the hammer Takuminov wields has the ability to make anyone it hits lustful. Takuminov then attacks Silphid again. However, with her body gradually becoming lustful, there is no way she can fight properly, and she receives a fierce blow to the groin with the hammer. Now completely lustful, Silphid takes her student's hand and takes him to the classroom after school... [BAD END]