The plot of the story is good, but the anime for some reason shitted on the character design of everyone, the novel and manga were already out, there was no need to make every single person look like a generic NPC.
Even if the staff thought some of them resembled someone in another popular serie they should put more effort in making them look better not worse.
Put every main character of the manga, novel and anime on 3 papers, remove the names, you can say who is who in the manag and novel, but they are too different and shitty in the anime, tha isn't just going with a low budget.
They left the ending open to a second season but who would sponsor something like that?
There is a chance that the blue ray got updated art, that would be more like a new anime, but is low, and woul dprobably little interest.
The first episode of a anime is usually the best looking one, but Retry kept it the same from the start, tight budget.