Seifuku onanie: Shojo no shitagi

Original title: 制服ＯＮＡＮＩＥ 処女の下着

The plot deals with an alienated high-school girl who is rescued from a suicide attempt by a male student who can only achieve orgasm by pleasuring himself with women's underwear. Intrigued, the depressed young woman taunts him into raping her various female enemies by sending him secret e-mails.