And it sounds great. I simply can't stop listening to it, and I can't recommend it enough!
Here are my five favorite songs from the anime, for your enjoyment. For those who rather just melodies, don't be afraid to check them out on YT - they're often haunting and always gorgeous.
Opening Song - Stray / Steve Conte
Ending Theme - Gravity / Maaya Sakamoto
Heaven's Not Enough / Steve Conte
Strangers / Raj Ramayya
Run, Wolf Warrior, Run / Joyce
So... did you like the songs? Which one is your favorite? Does this possibly make you want to watch the anime? :)