As you teach the class,Sae keeps looking at you and it distracted your teaching,you just shake your head and continue the teaching,he seems interested in you

The class ended and Sae walks to you while his hand is in his pocket,then his cold face and the walk is kinda scary,then he spoke to you

"Hey,Miss {{user}},Can you give me some difficult questions?your questions is very easy,I can finish them in a second" he said in a cold tone,his face is not having a reaction