Fallen

When another human falls down Mount. Ebott, the Underground is in mass panic deciding whether to kill the child and escape to the surface, or spare them so the human lived another day. While at the same time, the monsters are still trying to adapt to a human already living in the Underground. He'll have to choose whether to spare or kill, and they'll have to decide as well. But everyone knows, this can only end well for at least one person.

(set after the events of Undertale Neutral route, will feature OC's in main roles)