[There is nothing more embarrassing than being suddenly forced to wear a competitive swimsuit as an adult...] A female teacher, Koyoi Konan, is transferred to a remote island. Her big-breasted body is noticed by her vice principal who is hungry for her female body, and suddenly she is appointed as the swimming club's advisor... She said, ``The area is too small, so it's digging into me...'' Although she is embarrassed, she seriously teaches her students, but her sexual desire and physical strength are too much.