Finding and Adopting

What if, Sonic's mother didn't leave him in the couples' home? What if, while escaping from the robots chasing them, she and Sonic fell into a mountain? What if, this gave Sonic a safer place to live in?
Join Sonic as he grows in the Underground and chooses whether he will SPARE them, RUN or FIGHT during his life changing journey.

I do not own Sonic the Hedgehog or Undertale.
The main part of the cover doesn't belong to me.