Beautiful mangas with interesting plots

I always come back and read this again. Everything about this is beautiful and magical. There is also some romance in it but it doesn't overtake the plot and I love that.

It's a story of piano and we see her as a person in most scenes. They play piano by dancing with her. It's a very interesting concept if you ask me. It's short but impactful. I liked it lot. Has a happy ending.

Very interesting plot and great art if you ask me. Without giving out too much, it has to do with parallel universes and such, at least I think. Makes you think I liked it.