it's not wrong it's just the cover for the novel. the promo art is separate and done by a different artist (private scandal and antidote)
My bad but it hardly has any to no differences from the character design as they look exactly like characters from Painter of the night. I don't know if its cus of artstyle or not but it mostly look like Yoon Seungho and Baek Nakyum AU illustartion which can make people mistake them a lot
the cover is done by the artist of potn lol
That's what confused me lmao I thought we were getting a new manhwa from them
Wrong cover