The show centers around the personal issues between these girls. One has the power to stop time and run away while the other welcomes everyone yet distances herself from people. Throughout the movie, you'll see how they overcome their personal issues and grow to be a better person True enough, there are some underwear moments here and there, but they're not for fanservice purposes. The show uses heavy symbolism and is all explained in the latter part of the movie. Music wasn't extremely outstanding, but their execution and timing were remarkable. I found myself holding my breath when everything was silent but the voice actors andtheir way of executing the climax were very excellent. Animation and art were simple yet beautiful and pleasing in their own way.

I'd highly recommend it watching it, and I hope this helps!