Nakata, who has been doing his job as a teacher, a sacred profession, honestly, is nearing retirement age and going crazy. One day, he discovers some students being secretly filmed. When the camera is confiscated to check the contents, it contains footage of Nagisa getting changed, and of her swimming underwater in a school swimsuit. Nagisa's slim yet feminine body lines and plump peach bottom stand out in the tight-fitting swimsuit. Excited by the unexpected sight of his student, Nakata instructs his student to take some secret footage. Awakened to a new sexual fetish for school swimsuits, Nakata throws away the serious decades he has been leading and becomes honest with his own sexual desires...