It's not bad for a first book. I was confused because I thought Yan was the main character, but it turns out that Tohru is the main lead. The beginning seemed a bit rushed with how Yan and Tour met. I liked the idea of the spell beasts being sealed by books, but I felt that it could have been articulated better. It looked like the sealing department needs to constantly carry books around when going into battle. I do like the PR department so far. I am interested in seeing what happens in the second volume.

Not for me, I usually like shonen manga (see Demon Slayer, Witch Hate Atelier and others), but this reads too young.
I could forgo it if the drawings were amazing, but I find them just fine, not the target for it.