(Underfell AU) Sans, badly beaten by his brother, goes to his friend from the ruins for help. But with his injuries and his dissaperaence from Snowdin, what is to come on both sides of the door?

Error....the forced god of destruction. error never wanted to destroy. error never wanted to make people suffer. error never wanted to be enemies with ink. error never wanted any of it... after errors old timeline was destroyed. he lived in the anti-void. the only thing left of his home. with the all so familiar voices taunting him in the anti-void. and ink always attacking him. along with the traumatic memories of what happend when error first corrupted. he is also forced to destroy. what happens if ink and the good guys find out why error is the way he is? what happens if they figure out why exactly error has haphephobia? what happens if they find out just who the real enemy is? find out in corrupted innocence!