'I am sorry...' Chen was happy to see that, the little girl was apologizing for her doing. But still for a certain reason, making her say those words.
Just because of fear for him, make him a little unhappy about it. Though! it was also fine since a teacher needs, to be strict when it comes, to teaching their students. For their own benefit...
Chen believe that fact from the experience, so he was also acting a part of it.
After all, acting as a friend toward their student, is not something easy to handle, in the latter part of the teaching experience.
Looking at the red-haired girl, which was talking to him with [polite gesture, due to little fear. He acted a little tough, with a strict expression, as he asked.
