You Used To Smile That Way (그렇게 웃어주던 니가) 15 years old

A man is calling someone and looks very serious. He recalls the past with his sad face. He is wondering the reason.. 'You used to smile that way.. but why?'

Credits

You Used To Smile That Way Cast

Name	Character
Cheon Seong-hoon He was 32, now 48 years old

You Used To Smile That Way Crew

Name	Department