Okay! Putting my hat in the ring here by saying I thought the ending was great and made sense. That's the most important thing to take from my review given the other reviews. I mean, I think I see what the other people are saying, but overall I liked the ending quite a bit. Onto the regular review!
Art: Fantastic! Good character designs with great scenery. Facial expressions are generally quite emotive, sometimes even fairly subtle. The artist is great at spreads.
Story: for the most part this is run-of-the-mill Yuri, though the premise with the love arrows shakes it up just enough. I also like that the story is limited to three volumes. A fourth volume might have dragged. The monster of the week style stuff, but with love, worked for me. I found that it was a good way to consider the protagonists relationships while having something different.
At this point I've read most other stuff, so this was a treat that I've somehow missed. Big recommend!