My thoughts and criticisms
The worldbuilding of the story is really well done, that I can say. I also appreciate the characterization especially with characters like Harren and Jymsar.
The art is also a fresh thing to see, but I can't help but notice that in earlier parts of the story, Alen pretty much has this same expression. Either that or I am blind. The music is also really nice to hear. You can feel its ominous and eery vibes sometimes and more than often, it's calming to hear.
The writing style personally feels decent, but boring. I feel as if it would be nice if we could see a bit more showing rather than telling, though to be fair, things are different with books and visual novels.
I also find it boring how Alen becomes this info dump character who tells Reamus everything about magic. While telling the audience of info about your world is important, doing it too much may sometimes cause the readers to be bored out of it. Some of the information presented isn't even utilized properly (such as the scene about the sigils and their shapes and what they mean.) Instead of creating a captivating experience for the readers, info dumps like this often cause the story to be some quite ~interesting~ lecture instead ( or something).
As for the MC (or Reamus), though it's just my opinion, I'd like to see him characterized a bit further than the simple nice guy in the story who's interested in magic. It's nice to get to see his thoughts over on dialogue, but I hope to see Reamus of being his own unique character.
These are all my opinions, though. Please take it all with a grain of salt, but I also hope it helps a bit.
Also more pics of reamus please thanks jk