I have a strong feeling Yoon knows about it all and I hope I’m right
He doesn't know.
Didnt he see the pictures?in the box?
He does and some memories started to be back in his mind when they went back together in the villa. It’s said in the novel though. In the last chapter of the season he knows it all already.
I have a strong feeling Yoon knows about it all and I hope I’m right