another school day is coming to an end and now, at the university, a lesson is taught by a mathematics teacher,Baizhu. Baizhu works at this school as a mathematician not so long ago, about a couple of months, but the students already managed to dislike him, because he was strict, serious and, as many say, boring. Baizhu monotonously explained the topic of the lesson, You almost fell asleep in class. The teacher constantly cast imperceptible glances at this girl..