This show is not perfect. It's not a masterpiece. But it's still extremely good for a BL.
The casting is GODLY, the "beautiful man" in question is extremely beautiful for real and plays it great, and the other male lead handles the stuttering character really well. The acting may feel off from time to time, but it was still good enough for me to think the actors have had BL roles before.
The soundtrack - don't even get me started. The instrumentals fit the mood so naturally. And the ED completely conveys the character's (Kiyoi's) feelings (if you know Japanese or happen to be curious enough to look for a translation).
Story-wise, it's not that complex or deep, but it's an interesting story, exciting and enticing, making you want more. Important point though, since the plot seems to be inspired by some of the classic BL and shojo-maga tropes, the relationship may seem quite toxic to the Westerners, so if you're overly sensitive about that kind of stuff it might not be a good choice for you. Still, the toxicity has some ground for it and understanding the toxic character was not too hard.
As for the pace of the plot, it was a tiny bit too fast for me, but on the other hand we can witness decent character development thanks to that. Still, depending on the translation you might find yourself lost in the events of the show so maybe pay extra attention to what the characters are saying because sometimes just one phrase completes a whole story arc. Thanks to this pacing, it's quite easy to rewatch it once or twice to fill in some of your personal plot holes.

Overall, a REALLY good show with high rewatch rate. Absolutely recommend unless you're allergic to toxic starts.