Where is all begun

Did you think that after genocide the world is really erased? No. Frisk not knowing erased themselves from this world. Leaving behind Sans and Grillby as the only survivors. They were waiting for the end to come. But they didn't know, that their biggest adventure is just about to start.

Because a new human fell into the underground. But not by a accident...

This child wanted to kill themselves by the fall.

What will happen when Sans meets this child, when both of them are broken?

You will find out when you'll read about the New Soul.