He can't make sense of emotions, but he can read other people's actions: the curve of their mouths, how many times their fingers curl against the edge of a table, how often they chew.
People who look fine let their actions speak for them: I'm not okay.
What's wrong with them? Do they get better?
Xu Che doesn't know. He only sees their actions change.
Theme: Helping people see others in a different way.