Kinsou no Vermeil appears to be a typical magic academy school anime where the MC wants to be the strongest mage. The only twist is that his familiar is a demon girl. Besides that there is the childhood female friend who likes him and the cliche scenes. Like battling a bully who thinks the MC is weak but turns out to be strong. All very overused troupes and scenes.
I will say the art is quite nice and the animation is nice to look at. No cgi so far and no real poorly done scenes that distracts you from the story. The character design for his familiar is unique and nice. I like her personality. The childhood friend is nothing special in personality or appearance to many other animes with a childhood friend. I am inidifferent from them, but find the tsundere girls a little bland after so many of them exist.
My main gripe is with the MC's personality. The innocent boy who lets his emotions control him. I just cannot relate to them especially when they seem so nice that they seem fake like no person in the world is that nice. So, I really do not like that aspect of the main character. I much prefer a logical and confident MC (with hints of shy/embarassing moments are fine) like Ainz from Overlord or funny and whatever you want to do like Luiffy from One piece.
Personally, I would watch it as a good anime for the season, but not one that stands out. Check it out if you run out of animes for these magic school genres and don't mind those types of MC. For the most part, it's a fair show that I can see some people giving 7s or 5s or 4s if they don't like these over-saturated types of animes! :D