Suomi-sensei surprises – or rather shocks – her class with the announcement that the destination of this year’s class trip will be a nude beach. And before the first thoughts purposely missing the event come up, she cheerfully announces that non-participation will result in expulsion from school. She hopes for this excursion that the friendships among her students will deepen and that they will grow together as a community. At the beginning, nobody knows where to keep their eyes and everybody is more embarrassed than anything else, but the class president, of all people, who is considered very level-headed, is the first one who can’t hold on any longer. Suomi-sensei has also taken precautions for this and set up a “cooling tent”. However, the students are only allowed to enter it in pairs…