Spoiler . . . . . . . . . . . My guess is that a young Hwan made a wish which resulted in Chiwoo's parents death because his "one true love" is going away. Baby Hwan felt guilty as Chiwoo was also part of the accident which led him to a coma. But then Chiwoo survived and then he was happy.
THE DOLL. LOOK AT THE DOLL FROM THE PAST CHAPTERS AND TELL ME THAT'S NOT HIM.
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My guess is that a young Hwan made a wish which resulted in Chiwoo's parents death because his "one true love" is going away. Baby Hwan felt guilty as Chiwoo was also part of the accident which led him to a coma. But then Chiwoo survived and then he was happy.
THE DOLL. LOOK AT THE DOLL FROM THE PAST CHAPTERS AND TELL ME THAT'S NOT HIM.