Terajima Mikako became a boys volleyball team coach at a junior high school she has been assigned to. As an incentive for the team members who do not show the slightest enthusiasm, she promises to show them her boobs if they win a game.

The first Luna film.

In 2014 a live-action version of the manga, starring Mikuru Uchino, Aimi Yoshikawa and Megu Fujiura, was produced by SPO Entertainment. Wataru's father leaves him alone but not without some guidance - in each episode he is visited by his teacher, Runa Sensei, who instructs him on various subjects - math, cooking, wrestling, acting - in a busty, and sexy way. Runa is played in each episode by a woman who bears a resemblance to a JAV star and she usually seems to end up losing her clothing while giving him lessons.