Story: A-
The premise of this story is really nothing special, school for rowdy kids parked right next to an elite all-girls school, delinquent-looking boy and model student fall in love, very Romeo and Juliet. The think that makes me rate the story so highly is the way it handles the drama that the premise creates. While at the moment the schools haven't really been given much focus, they haven't been ignored and still feel present, giving the interactions main characters a slight sense of worry, especially in public, but never enough to ruin the mood of the story. Drama that is normally stretched out into 20-chapter arcs is wrapped up much quicker and yet it never feels like it was rushed or handled poorly either. It loses a few points simply because due to the unoriginality of the premise, but overall, there is absolutely nothing to complain about here.
Characters: A+/S- (it's toeing the line)
Ok, here we are. I have the character rating so high not because they are the most unique, trope-defying characters of all time, but because they are some of the most believable characters that I've read in a Japanese romance series. Each of the character is both appropriately teenage, but also appropriately mature; they react to situations in ways I can honestly believe a real-life teenager of their personality type would do, with absolutely minimal anime bullshit going on. On top of that, the way they are written makes them incredibly lovable, like you just want to give them a hug or something. Now, I'm not going to claim these characters are even remotely on the level of the likes of Berserk, Monster, or any of the best of the best series out there, that'd just be straight up disrespectful to them. However, within the romance genre, especially those written by the Japanese, you will very rarely find more lovable or relatable characters in the medium and are the best part about the series.
Romance: A+
A lot of what can be said here is related to the character section, but to sum it up, the chemistry between characters is fantastic. It never feels forced, the progression feels natural, and most importantly, no random anime bullshit has popped up to create drama between them; the friend group is self-aware enough not to interrupt the juiciest moments or make them weird, and all points that might have created a rift between them in any other mange are quickly shot down with surprising maturity on the characters' behalf. I particularly enjoyed how they took care of the overprotective friend trope without making anything feeling annoying or forced in the process. It also doesn't fall into the pitfall of dragging out things forever, and usually gets straight to the next milestone in 5-ish chapters. The only reason I'm not rating it higher is due to a lack of development, but the series is only on chapter 42 and shows no sign of ending soon, so there isn't much worrying needed here.
Comedy: C+
The weakest area of the series. Now, not to say the comedy is bad or anything. It's perfectly acceptable as a matter of fact; it never intrudes in the story for the sake of a cheap laugh. It's just not that great; while you won't be groaning at any of the jokes, don't expect to get anything more than a light chuckle out of it; no belly laughs found here.
Art: S-
The art style is freaking amazing, but it's also tough to describe. Just flip through a couple of the pages, check it out for yourself. It falls under that category of art style that is somehow both unique and familiar at the same time, similar to Marimashita, Iruma-kun! In particular, the characters' expressions are always a sight to behold, in a very shoujo-esque way.
Overall: A+
What's more to be said? Read it, I've said everything I can, the rest is up for you to discover yourself. Read it!
For perspective, here is my ranking for Horimyia:
Story: A+
Characters: A+
Romance: A+/S-
Comedy: B
Art: B
Overall: A+
