Her stories sometimes have a “today is just another day” kind of feeling and because of that it seems that her characters can take longer to develop. In my opinion, this is probably why her multi-volume stories tend to be better than the single volumes or oneshot collections. It isn’t always that way. For example, I think that Uchi no Ouji Irimasenka and Don’t Cry Baby, both single volume stories, are better than The Yuri Sensei series (though, in general scoring, they all would be approximately a 4.0). But this may be because the second volume of the Yuri Sensei series wasn’t planned until after the first one was complete–this is just speculation. Whatever the case, Kiss Blue is one of my favorites.