The Worst Day - S1.E6

Si Won finds out that his sister had submitted his work. He becomes the subject of rumour and ridicule and a chubby childhood photo of his is circulated around. He asks whether Da Un (whose parents were the owners of the production company that held the contest) had had a hand in making him win. He loses control and snaps at Da Un when he tries to comfort him. He, nevertheless, takes Si Won's bike back home for him. Si Won goes to Da Un's home and has a heart to heart talk with him. He finally speaks out about his insecurities and reveals that he knew that Da Un likes him.