Classic Hentai Horror: Beautiful (only outwardly!) and young schoolgirls are trapped by a maniacal janitor (Isaku). And he's well prepared for a Marquis DeSade-style party, prepared the scenery (an old school building with long, dark corridors and lots of empty rooms), has a variety of supporting "toys" and he has plenty of time! There is no way out. No one will come, no one will save him.