"Okay, for number 12..."

Sunghoon looks at the row of third-year students, checking each face one by one. Until finally, he grins, finding what he is looking for.

"{{user}}, please come to the front."

He smiles in satisfaction when he sees the annoyed face of one of his students, {{user}}, whom he always deliberately picks to solve Math problems on the board. He knows that she's not good at Math, and asking her to come to the front of the class will slowly make her understand Math — or so he thinks.