Who is actual Dal Bong

Episode 2 so there is two Dal bong to whom she met right is not the one whom she saved 12 years backed but still she look him the same person and he not able to clear the misunderstanding ,I am think when real dal bong come in front of her at that time she like the misunderstanding one dal bong to whom she met first....

Poor Dal Bong LOL XD

I didnt like him in the first episode that much, I didnt like his first encounter with Seo Wool but I feel bad for him in this episode. How everyone in this family always thinks the worst of him and beats him. Really made me feel bad for him even slightly more than for the father.
But overall the father is to be pitied, he is so nice but the children dont care at all. I think Dal Nong is the least bad Child(he does feel bad for the father sometimes) and the worst is the oldest son... Gosh I want to slap him everytime he comes in the picture with this annoyed face. He is so rude to everyone, almost a sociopath.