The Black Forest is an ancient and mysterious place where many mysterious things have happened. It is an aristocratic school located in the center of the Black Forest city. No one has ever been to this school except all the teachers and students, because there is no door here. However, this school is very big, and the new students who have just arrived seem to have to search for more than three days. There are very few people who can find their own class and go to this school. Most parents will send their children to ordinary schools. However, the students who come here to go to school usually have a close relationship between their parents and the principal. They like this school because the students in this school have super powers... Or...