one day, there was a door discarded in the school corridor. "Is this the one they used at the school festival? It's in the way," I was looking at and touching the door when the teacher told me to put it away. Reluctantly, I carried the heavy door to the classroom once, and while wondering what to do, "If I open the door like this, it might lead to a girl who is changing clothes...!! What? You're kidding?!" It was a mysterious door that could go anywhere, even to the place where the girl was changing, the bathroom, and the toilet stall!!