Responses
He was but I guess it hurt his pride that the person he thought was obsessed with him and wrapped around his finger was 'cheating' on him with one of his best friends. And ofc he's also pissed at what his best friend did because he thought Mok was his accomplice in exploiting and making fun of Nanjo behind his back.

I'm confused why is sunhwa so pissed?? I mean, wasn't he also sleeping around like crazy