Responses
Everyone here was slightly wrong. Mr. Kwon didn't become his actual parent, Ho simply entered his register. Which makes them legally a family, but it doesn't mean Ho HAS to become his son for it to work. Just family. However, because it IS an adoption and most people associated with parents and children that's why Ho used 'daddy' at the end lol

I didn't get the hole adoption thing ╥﹏╥, can someone explain it?