Okay so I read the novel and Ash and Nick dated before. They broke up but I cant remember why. Nick is dating Karlyles brother and for some reason Ash and Nick meet up (not for any reason like cheating but I cant remember the specific reason). Karlyle sees them and gets upset because he assumes the worst i think and is either rude or standoffish towards Ash, which leaves a bad impression. I think they should have done a better job at including these details in the manhwa because it seems pretty important to the beginning of their contract/relationship. In the novel, ash kinda disliked Karlyle at first. It's why he says that "dont worry, I couldnt fall for someone like you" like towards the beginning. In the manhwa it seems so weird and out of place without that context. It's also why Karlyle gets upset when he sees Ashs reaction to hearing Nick is pregnant, Karlyle thinks Ash isnt over nick and gets upset.
Reading the novel cleared up a lot of the things that confused me about the manhwa at first cuz some stuff really could have used more context.

Okay maybe I’m dumb but I never understood what the second impression was? Like at the very beginning they keep mentioning how the “first time” (not actually) they met was left with a bad impression but when was that?? When would Lyle have met Ash and Nicholas? It’s always confused me