This is a spoiler free review from the perspective of a fan of the visual novel that rewatched the anime a year later.
Positives:
-I'll start off by saying I like the choice of voice actor/actress change for Riki as I find that Yui Horie fits the role a lot better than the original casting in the VN.
-The main cast (Riki, Rin, Kyousuke, Masato, and Kengo) share the same chemistry as the VN, which is very well adapted.
-Mio: Mio's route is adapted fairly well as they give it enough time. It's missing some key scenes, but overall, it's a good enough adaptation.
-The slice of life sequences, especially the episode where Riki visits the girls dorm, are very well adapted and fun to see animated.
-The opening and ending music from the VN is still present, as is the brilliant soundtrack (albeit used oddly at times).
-Extra insight into Rin and Komari becoming friends is a nice touch for fans.
Negatives:
-Haruka: One of the worst adaptations I've ever seen. Now, I don't think Haruka's route is any masterpiece, but the adaptation is absolutely awful. It makes Haruka and Kanata look like complete nutjobs because of the weird focus on the wrong scenes and the fast pacing because of the time constraints.
-Komari: Her ending completely ruined, the original story of overcoming internal trauma by looking at it from a different angle.
-Animation is only serviceable, lacks detail, and clearly isn't made with much passion.
-Art style change is very odd, looks a bit generic, and loses a lot of the charm of the VN.
To conclude, the anime is an ok adaptation... I originally liked the anime when I watched it; I still thought Kud and Haruka's arcs sucked, but I enjoyed the rest of the story and liked the characters. But upon rewatching, it's an extremely mediocre, barely serviceable adaptation of the visual novel. I think if you're never going to read the visual novel, it does something at least, but it's most definitely a worse experience.
I've seen a lot worse adaptations before, so I don't want to be too critical, but it's a very flawed show on its own, and now that I know how mediocre its adaptation is, it makes it a lot worse.
My Anime vs VN ratings for each arc:
Komari - anime: 4/10 VN: 8/10
Haruka - anime: 1/10 VN: 8/10
Mio - anime: 7/10 VN: 8/10
Kud - anime: 3.5/10 VN: 3.5/10
Overall rating: 5.5/10
(If you would like to see my short review of the VN check out my backloggd or vndb)
