Smile for everyone.. (sonadow)

Sonic the hedgehog, everyone knows him, the hero of mobius! However, after some time he starts getting haunted by mouths, big smiling mouths to be exact, this torture will not stop, until one night, he starts getting "haunted" by a hedgehog, this hedgehog comforts him until one night he can't take it anymore, he can't risk it anymore..he decides to force a smile on sonic, stitching the smile, he can't bear this anymore. What will happen next..?