Intense curiosity strikes Sehun one day when his girlfriend, Hayoung, a Day Care assistant tells him about a 3 year old boy who looks like him. One day while waiting for Hayoung at work Sehun sees his old flame coming for his look-a-like, who calls her "Mom." Old flame, Namjoo, gives him no recognition when they meet, but when Sehun wants to be with who may be his son he will have to discover why Namjoo disappeared on him years ago.  

***Characters are mine, this is all from my imagination. I'm only borrowing images and names, no other intention.