Kokoa decides to join the swimming school her beloved boyfriend attends, and they secretly enjoy a romantic relationship, kissing by the pool and holding hands on the way home from school. The male instructor, excited by Kokoa's swimsuit that accentuates her large breasts and buttocks, completely ignores her innocent feelings of love and, after all the students have gone home for a private lesson, plays with her crotch as she flutters about, then inserts his erect penis deep into her vagina. Completely addicted to adult techniques, Kokoa breaks up with her boyfriend and devours sex with the instructor in the pool...