[He apparently doesn't feel the need to be too cordial, because he doesn't even give her his name back. Instead, Sang-Wook's secondary expression reveals itself, as his serious and sour expression turns serious and puzzled, instead.]
... This is my normal expression.
[He says it in a tone that earnestly asks: What's wrong with it?]
no subject
... This is my normal expression.
[He says it in a tone that earnestly asks: What's wrong with it?]