Y'all saying Mujin is gonna play cupid at the party refuse to see what he really is: SELFISH. I hope to be proven wrong but i'm going to assume he will flaunt his "relationship" with Seung Ah at the party worsening the misunderstanding between Seung Ah and DG.
He has trapped Seung Ah when he quit his shop. Seung Ah now feels responsible for getting Mujin to quit his shop so he could make him comfortable.
I'm a fujoshi but let's call a spade a spade. Mujin is not green flag.
