If I were to decribe Reimei no Arcana, it would be an amazing yet flawed manga. I am absolutely in love with the story and the artwork. I don't know why there are a few people who seem to claim that the art needs more work, but I think it fits the story well. The mangaka draws and writes emotional scenes very well and there are quite a few heartbreaking moments in this manga.
Now for the romance. I am absolutely in love/heartbreak with Caesar and Nakaba. I'm sorry Loki, even though you loved Nakaba first, it's very clear that Nakaba's heart belongs to Caesar and vice-versa. Too bad something happens later on in the series where they separate... and it just crushes my heart. There are way too many feels in this manga! Besides, Loki has always seemed a little bit shady to me. It always looks like he has /some/ kind of ulterior motive.
Anyway, even though Caesar was an ass in the beginning, he becomes someone who I look for in a hero. I believe that he loves Nakaba whole-heartedly and would do ANYTHING for her. Even going so far as to irrevocably commit something that can be labeled tragic in my opinion. She does the same thing as well. In order for change, you must give up something in return.
Overall, I'm really enjoying the story so far. I'm starting to see that this series will go on for quite some time since there are a bunch of unresolved feelings and the rest of the arcana members to be revealed. The reason why I'm claiming that this manga series is flawed is due to the fact that while the story started out really amazing, the later chapters are rather boring. Especially after the whole Akhil/Lithuanel arc. I'm completely clueless after that because there's apparently a time skip after chapter 39.