A teacher is taken by a girl Mana onto an isolated island where many many women live on! Only one man is entitled to inseminate them on this island concerning its lack of young men!
She's a paid dater that doesn't let your have penetrative sex with her. You, her customer, don't mind because you are absolutely smitten with her. But one day...
On a certain rainy day, she was caught masturbating by the janitor... This schoolgirl, wearing wet-through clothes, is corrupted by the pleasure from his d*ck.