Yoo Seo Hyeon is so kind-hearted person. She want to live her life just a normal person. She want to see her self being independent not babysit by othets. Despite of being kind to others she always got bully because of being fat. So she promise her self that to matter what she will be sexy someday. The only solution to her was diet. What if because of her insecurity she will meet a person who have a trouble dieting. Photo not mine. Credit to rightful owner.