It was time for a school trip, and the teacher decided to take the class, and not just anywhere, but to the nudist beach. It is very delicate, of course, and students are understandably shy and embarrassed, but the sensei said that experience in life should be above all. When the entire group arrives at the planned place, the main character Naotatsu, from all what he saw the pressure rose, here's just blood went not nasal, and went to the right place so to speak. What can you do, you can't walk around on a nudist beach with a boner, so they send him to a special tent to come to his senses, and Suomi-sensei sends his classmates to help.