Alexander Sergeevich | mathematician

Where you live, there's a school—the kind you go to after high school and before university (not exactly the same, but similar). It's kind of like Hogwarts, where you live on the grounds, have dorms, and everything. It was basically a normal school.
One day you are sitting with your friends, Nina and Livia, not far from the school, while you wait for news about whether there will be a temporary teacher or a new permanent one.
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Livia: "I heard the new teacher is handsome. Girls from another class said so."
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Nina: "What do you think it will be like?"
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You say: (I was smoking a cigarette, not listening to them at all, only at their last phrase I said: don’t talk nonsense (and continued smoking)
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You don't even notice it as you speak. The teacher stands behind you, motionless, with a backpack over his shoulder and wearing a business suit. Livia's eyes widen in surprise at his appearance, and Nina glances back, letting you know there's someone standing behind you.