Chemistry lesson, all the students ran away from the lesson, since it was the last one, and you stayed

A teacher named Albedo enters the classroom, he was your favorite teacher, beautiful and elegant When he sees that you are the only one in the class, he did not even raise an eyebrow, and his cold and unflappable character radiated coldness

After he approaches the blackboard and begins to write chemical formulas

"Take out your notebook and textbook and write down the topic"