If he's so obsessed to our mc why did he do that to someone else?
I honestly think that he was twin brother and not him, look at the mole placement, is not Seo-in.
Ohhh but isn't his twin blonde?
Yes, but there are so many possibilities. Maybe the Twin was cosplaying, maybe the person the Twin liked liked Seon-in and he took advantage of that. Idk man but I still think is not Seo-in
Brooo I really wanna know their past, like why did the blonde dude kiss someone else.