He’s like really confused. He knows he’s attached to Nakyum and doesn’t want to be. When Nakyum says “it can’t be”, that really hurts Seungho because he knows even Nakyum thinks the idea of him loving a lowborn or loving him at all is impossible. He takes it as a direct rejection. To punish Nakyum for sort of breaking his heart and try to forget he ever had the feelings in the first place he tries to share Nakyum with other people like he means nothing. But he can’t bring himself to do it because he truly does care about him.

If he knows that he's gonna get jealous the second someone puts their hands on Nakyum then why the fuck does he even try to push him into an orgy? I already knew my man was kinda fucked up in the head but I didn't expect him to be this dumb too