From what I understand, the two seonwoo swapped places when they are still 9? I guessed. Then they swapped again when they are already an adult. But still they didn’t elaborate it properly. Felt like an idiot the whole chapter cause I also didn’t get it at first. Based from what I’ve read (from a novel reader) that’s really the ending and the side stories would be the one to explain it I guess?

Idk why after the chapter where mc died and until the end chapt, is it just my brain to dumb to think ....or i feel the chapter are just really confusing.. I don't have friends to ask so....does other have same problem or I'm just dumb dumb ╥﹏╥