Charming the Duke of the North is a story surrounding the female lead, a Korean actress who has an accident and regains consciousness in the Kingdom of Iklean, which is a completely different world. She meets the male lead, who happens to be the duke, and they form a contract and pretend to be lovers. Regarding the title of her charming him... you probably already know how the story will end.
Story: 6/10
The story wasn't really anything special, as you can find many other manhwa with the same theme of a fantasy romance, a fake relationship contract, the lead coming from another world, all of the above, etc. Throughout the story, the pacing was mostly good until I got to the last 20-ish chapters. It felt as if it was just a little bit rushed because the events were just being thrown around. A lot of the occurrences that were in favor of the leads were obviously plot armor, and some of them also just genuinely didn't make sense. I also would really like to know how the FL's original world was handling her absence, but I don't recall ever reading anything about that... However, despite the previous things that I disliked, I really enjoyed the slow burn-ish romance and how they grew to realize their feelings for each other.
Characters: 5/10
Same with the story, the characters weren't really anything special, either, and the same kinds of characters can be found in many other manhwas. There wasn't anything intriguing about how they were written. However, I like how the author incorporated the FL's identity in Korea into her identity in Iklein. Seeing the character she became with the help of her other self was interesting.
Art: 8/10
I have nothing critical to say about the artwork. Majority of the chapters consisted of beautiful drawings, and I enjoyed the cartoonish drawings here and there, too. You can really tell how much work the artist put into their artwork.
Enjoyment: 8/10
While there were multiple moments of confusion or questioning the actuality/logic of some events, I never felt bored reading this manhwa. I enjoyed the romance and suspense. The author also did a good job of incorporating comedy into the story pretty often, even in the middle of a moment that you think would be serious. Others might not like this, but I enjoyed this, too.
Overall: 7/10
In summary, Charming the Duke of the North was nothing entirely special. The plot and theme was very common, nothing stood out about the writing, and the plot armor was way too obvious for me. However, despite all of this, I still genuinely enjoyed this manhwa. The art was beautiful, the slow burn was good, the drama and suspense kept me on my seat, and I laughed multiple times while reading. Mathematically speaking, this manhwa would be rated a 6.75/10, so I'm going to round it up and rate it 7/10. I'm also a very easily pleased reader, so if you're a more critical reader than me, you'll probably score lower / enjoy this manhwa less than I did.