English teacher Riasu is in a secret relationship with a colleague. One day, a new principal arrives at the school where she works. At first glance, Riasu seems kind and seems like she'll get along well with him, but in fact the principal is an extremely abnormal pantyhose fetishist. When the principal witnesses Riasu getting cozy with her girlfriend in the deserted school, he takes a photo and threatens Riasu. Riasu succumbs to the threats, and gradually goes crazy with the unknown and immoral pleasure brought about by the principal's perverted pantyhose fetish sex, which reveals his true nature...