I was also enamored of this manga, and read anything Otsu Hiyori. In fact, I just reread everything by her just for the feels. Love the art style, very simple. The expressions are also very good. I especially love the little one-shots.
I love Otsu, because Blue Ocean Cinema was the first well written series I read were the story gives me a warm feeling in my chest, but I always want her stories to have another chapter afterwards. I want to see these two characters interact more and go out on a date or something. But, still great. Otsu Hiyori is one of the best.
I love Otsu's works too but I always have a slightly uneasy feeling when I read ( some of ) them.
It feels like one of the girl don't really love the other girl, I mean she loves, but not really, kind of "Oh, you love me that much, then I wil love you too"... ugg Idk how to explain it clearly.