I looked it up. It was Kim Seonho and Seo Yeaji. I don't know why the op skipped it. That account has been spamming and consistently promoting this drama for some weird reason. Cringe behavior to be honest in a drama review site especially when we just wanna read honest reviews on dramas.
I dropped it at ep 13. It was ok in the beginning but went downhill quickly. I guess people who likes unrealistic, over the top acting and plot and is rooting for the bad guys episode after episode, then this is for you. I tried so hard to finish, i gave up.