"You were born to wear a school swimsuit..." Himeka, a transfer student, is targeted by her hysterical homeroom teacher who loves school swimsuits so much that he can't help it. He puts her to sleep with drugs by the pool and then rapes her while she's still in her swimsuit, even taking pictures of her. He blackmails her with the photos and rapes her while she's still in her swimsuit. The perverted teacher gets excited when he sees her resisting. "You look more delicious than anything in a swimsuit." A twisted special lesson with just the two of them staying after school with no end in sight...