The art is good and the story is clear and unambiguous, the work is obviously on the high end of the bell curve. However, it has plenty of very common flaws too. Many plot points, including the main "crisis", are contrived, side characters are almost more engaging than the main couple and overall story is somewhat unrelatable. Nothing that is uncommon in every romance manga, or manga as a whole, tough.
The arcs are clearly set out and followed through. Each one has a clear foreshadowing, end goal and resolution, so it feels like there is no filler. Nothing is left unresolved by the end.
The side characters, as mentioned before are interesting and engaging, with clearly defined personalities. Each has their own convictions and outlooks on relationships, which doesn't exactly make them three dimensional, realistic characters, but certainly adds to their relatability. A clear stand out for me was the aromantic person that sees himself as a member of the audience in the theatre of romance. Perhaps this is my inexperience speaking, but he felt like a breath of fresh air that does not get enough representation in stories. He also gets additional points for not just being a mandatory trope insert, but a very unique character that played with the main character's delusion about her own attitude to romance. A resolution to the "lie the protagonist believes in", if you will, that made the scene of realization natural and born from within the story rather than contrived on the author's whim.
Speaking of, the two main characters are not exactly as unique, but cannot be strongly attributed to any cliché either. Yuu's drive to help the person she admires, constantly struggling with the boundaries set between them and whether she is justified in crossing those, is definitely engaging. It is executed beautifully in its subtlety (or lack thereof) and with enough maturity to make any similar plot in other manga blush in embarrassment. The consequences that follow are also fairly well thought out and resolved accordingly. Thankfully, everything follows cause-effect style of storytelling, which is very telling of the author's ability to tell an interesting story without relying on event that come out of nowhere.
All threads are tied up in the end and no character is left in ambiguity, which is always a strong plus in my books. What is more, the conclusion each member of the story reached by the end is not only unambiguous, but quite satisfying, so there is no bad taste in your mouth after the last chapter.
Perhaps the biggest issue I have is the discrepancy between the tone and conceptual driving force of the story. "Realistic" tone that it goes for that lacks heightened feelings and oversaturated emotions very much clashes with the amount of suspension of disbelief you have to take with characters motivations and main plot threads (namely, without going into spoilers, the entirety of Touko's development). So you are left with neither hyper realistic, grounded, mature story, nor with alleviated narrative wearing pink shades. Simply put, it's neither full-on straight-faced realism nor heightened doki-doki. That is not to say that they cannot co-exist together in one work, but here they diminish each other instead of working together.
It's good. Honestly, a strong 6 for me. But the author clearly cared a lot about the work and has put so much effort into it, it's unfair to not give credit just for that. Please don't mistake that for a bad score, however, especially with hyperinflated scores nowadays, where anything below 7 is considered worthless trash. It is above the passing grade of a good story for me, it just doesn't have enough relatability and cohesion to break into a high tier. Aside from that it's not exactly my cup of tea, but might as well be yours.