Responses
It's the real son
Min Woojin’s half brother. The non-illegitimate son.
Earlier, it was explained (sort of) that Woojin's father was married and had a son, , Min Siwoon (I think),but he was really sick, so he was never seen by the public. Then, Woojin's dad took Woojin so he could take Siwoon's place. That's why Siwoon told Woojin he would die, because Woojin would cease to exist when he took Siwoon's place. He would no longer be Woojin
who the fuck is the dying kid yo??