My favorite yuri manga. Free of clichés or silly/dragged out drama unlike most serialized yuri stories. The story and plot so far is interesting and well done. Every chapter doesn't end up with a cliffhanger or dramatic twist and still it leaves you wanting for more/knowing what's next.
The characters are great and complex, the development is shaping very nicely too.
Something that stands out a lot for me is that there are a lot of subtle visual details most people don't notice (even I didn't until some anons on 4chan pointed them out) that make a really awesome example of "show, don't tell". Some of these details contrast scenes from earlier chapters to the most recent ones, to show Yuu's character development.
Another positive aspect is the pacing, it's perfectly paced.
The art is pretty good so that's a plus. Also... (SPOILER ALERT )

................................................ and lastly, watching mc Yuu slowly fall in love is one of the cutest things I've ever seen in romance :3