Appearing before students out of thin air, this strange tiny animal hands out brand new erasers; because he has a big acorn underneath his arm, he has become known as "Acorn Master" among the student body. The erasers contain a drop of magical power, allowing it to erase not only pencil lines, but even problems printed out in ink, so be careful. The craftsman who makes these erasers, there are rumors abound that they might be some sort of obstructor or violator from another country, but the details concerning them remain unclear.