The new swimming club coach turned out to be Gozaru Temple, who had once been involved in a sexual harassment scandal that led to police involvement and his departure from the school. He had made a pact with a demon, gaining the power to manipulate others at will. Just as the new club president, Izumi Ki, was striving to rebuild the team, the worst nightmare-like days began again.
First, he called out the big-breasted honor student, Moka, to an empty classroom, claiming it was secret training. He gave her intense tongue kisses while stimulating her nipples to increase their sensitivity. As Moka swayed her hips and begged for his dick, he rewarded her with a blowjob, then fucked her raw from behind in a reverse cowgirl position, pounding her from below with his oversized cock. Next, he called out the innocent-looking club member, Tsuyuha, for after-school detention training, lecturing her that the basics of swimming lie in the lower body while thoroughly checking her pussy with his dick.
For the club president, Izumi Ki, who accidentally regained her senses, he subjected her to secret training involving restraints and toy torture on her erogenous zones—nipples, pussy, asshole, and anus—leaving her in a state of neglect. When her pussy was soaked to the limit, he raw-dogged her with his monstrously huge cock, fucking her nonstop until morning with a creampie press.
When the two-night, three-day intensive training camp began, his three favorite girls naturally turned into onahole training partners. During lunch, they were made to perform a triple blowjob under the table, and during practice, they were called out for sudden doggy-style fucking. After lights out, secret raw fucking instruction sessions were held, hidden from the other members. The story depicts how the serious swimming girls succumb to pleasure, defeated by the perverted coach's dick.