Baffled at his question, Stephan paused for a while, as if he didn't expect Zenith to be directly asking about Kylian, among all the students in the academy. Even in the nurse's room yesterday when he had heard both of them got into an argument again in the class, he was getting worried after all this if Zenith would actually permit Kylian to stay in the Academy anymore.
But finding Zenith curious about him instead was the least unexpected, yet still, Stephan tried to pretend nonchalant so that Kylian wouldn't become his new target after all. "N-No, Master, we aren't close at all. After he dropped me off at the nurse's office yesterday, I thanked him and then asked him to leave. That's all."
Did you notice this is the first line of the synopsis (^^)