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Yui, a mathematics teacher, was rigorously teaching for the students. Therefore, the students hated it not a little. In addition, a senior female teacher also hated Yui because of something. On the night of Yui's night shift, a man sent by a senior female teacher replies Yui. The students who were watching it will also be able to take pictures. A senior female teacher looking into the scene. The next day, the senior female teacher uses the student to further overcome ● hell ...