The students discuss the disappearance of their teacher, who has gone on vacation. One of the students asks the teacher if he can announce the disappearance to the class, but the teacher says that it's too nice weather to do so. The students wander around the campus, and the teacher introduces them to the walking club, which has worldwide walking competitions. The girls in the swimming team are working hard to improve their technique. The teacher introduces the students to the school's athletic clubs, which consist of 21 students who compete in various sports. The boys in the indoor class are also working hard, but they're too small to compete in outdoor sports. They talk about the "school dragon quest" , which they believe is a reference to the ancient Greek mythology.