This has nothing to do with the Seven Deadly Sins anime. This isn't a cross over. This is something I got from a Tumbler writing prompt. More information inside.
Amidst the shifting sands of time, a resilient musician and her unwavering companion face the challenges of a fading reality, finding strength in their unbreakable bond and the timeless melodies that resonate within their souls.
After being unable to pay her bill to the local dentist, Fluttershy is given an option to clear her bill and it is a very unconventional option. Fluttershy, despite having great friends, is lonely and decides to take the dentist up on her offer.