Responses
My hypothesis is that she was the person Yeon was destined to be with. As we have seen through a flashback you can force a red string connection by removing the red string from the rock and attaching it to two people, which young Joseph period Yeon did between him and Kihoon. So probably the girl was his soulmate before he forced destiny (reason why it’s flickering)
That's such a nice theory Omg!!! I cant wait to see more lore
Idk why but im very worried about that red string with the girl.. WHAT WAS THAT ABOUT!,!? Σ(っ°Д °;)っ