His mom and dad ╮(￣▽￣)╭(▰˘◡˘▰)
I mean it's not lie ╮(￣▽￣)╭
Not one of the main cast. He is an old childhood friend of Byul's who grew distant for some reason.
As a little Easter egg, him and siwoo were close as children in the love is fantasy story, and even got fake married
He was the exboyfriend
Byul married another kid
who’s son is siwoon again?