[There's nothing more embarrassing than being forced to wear a competitive swimsuit after becoming an adult...] A female teacher , Konan Koyoi, is transferred to a remote island. The vice principal, who is hungry for female bodies, notices her busty body and suddenly appoints her as the advisor for the swimming club... "The surface area is too small, so it's going to get stuck in..." Despite the embarrassment, she trains the students seriously, but the members, who are overflowing with sexual desire and physical strength, are at their limit! They call the teacher and splash their semen on her voluptuous body and continue to violate her!