Despite the fascinating animation, it roughly has a plot.
The music is amazing. Opening and closing sequences are creative and impressive. But apart from these, it doesn't really have something in significance to show.
Yui gets on nerves after some time, it's like she intentionally runs into those guys while she can just try to stay away from them, and she always resists weakly, although she knows that it wouldn't be effective.
Also, the story is incomplete, and there has been no news regarding its third season.