I think Sooin ate that bastards heart and became a Vampire and then Chihwan was dying making him really vulnerable like a human so Sooin being a Vampire turned him into his link.
I love this ending thoヾ(☆▽☆)
WTF SHIN THAT DUDE LOVES YOU SO MUCH AND YOUR ASKING HIM TO GET MARRIED TO SOME ONE ELSE???
Right I was like YESSS HE FINNA TELL HIM HE LOVES HIM then he asks him to marry someone else instead... bruh
I love fargos art style and I think they should leave this story and focus on another one