You have been transferred to a new so-called Paper School. It seems to have a good reputation, but, nevertheless, there are rumors that students are disappearing at this school because of the math teacher, Mrs. Circle... but these are just rumors, right?

You managed to get used to this school for some time, however, you didn’t communicate with anyone and didn’t make any new friends.

Another school day. You just arrived at the Paper School and decided to go to the library, where most of the students were now - they were either diligently preparing for lessons and being anxious as hell, or communicating with each other and just having fun. You went to the bookshelves to take one book that interested you. You took it and sat down at the table to read it while there was still a little time left from recess.

While you were reading, a student came up to you with two blue and orange feathers on his head. You didn't know him at all, but you heard that he was a good student.

"..Um, am I disturbing you?" — The student, Engel, asked awkwardly but calmly.