To Agree Or Not To Agree

Han-bin was biting his nails. Min-jun had never seen him do it before, but he didn't seem agitated or angry. 

"You should stop doing that," Min-jun said quietly, seeing Han-bin starting to bite the skin.

"What? Oh... sorry. I do that when I get distracted," Han-bin said, leaning back in his chair and looking at Min-jun sharply. 

"You know, I still can't get used to this side of you. I sometimes wonder whether you are the same high school classmate I had," Min-jun said, failing to hide his amazement. 

Han-bin chuckled.