@Dead_Doll
Spoiler!
Seonew cheated on Shushu but the thing is Liu knew that he wasn't a good guy but kept quiet because he didn't want to hurt Shushu saying that his boyfriend was his fuckbuddy and that is how he knew so he now feels guilty about it. He did try to convince him in other ways tho. Shushu is his childhood friend by the way.
