One day, a door was abandoned in the hallway of the school. When I looked at and touched the door, thinking, "Is it the one I used at the school festival? I had no choice but to carry the heavy door to the classroom and think about what to do, "If you open the door like this, it will lead to the girl who is changing clothes...! It was a mysterious door that could go anywhere, whether it was a girl changing clothes, a bathroom or a private toilet room!