Suk-O has always loved Suh-Hee so when he sees her some years after, he confesses his love to her and they spend the night together he wakes up in the morning to a little boy in the bed he tries to find the father and meets Kang Chul, he's really jealous of him (Suh Hee was actually raped) but Kang Chul actually has a crush on 'him' (the 'him' he saw on a specific day, actually Suk-O's twin)