Monsters in Sans and Papyrus' universe had been on the surface for several years, and (mostly) comfortably got along with the humans they coexisted with.

Unfortunately for the skeleton brothers, their daily lives got turned completely upside down when alternate versions of themselves suddenly started popping up in their universe.

While it took a lot of compromise and a LOT of patience, the odd bunch of skeletons, all from different universes, finally settled back into a somewhat normal routine.

That was until one day, a strange human showed up in their lives.

Or, more specifically: On their front porch.

"OH MY STARS! PAPYRUS! THERE'S A STRANGE HUMAN ON OUR PORCH" Blue called excitedly into the house, garnering the attention of the few skeletons within earshot.

"WHAT?! A NEW HUMAN FRIEND? WHAT ARE THEY DOING ON OUR PORCH?" Papyrus answered, equally excitable, the tall skeleton rushing out on the porch, stopped short by the sight of the human sprawled out, face down, on the deck.

"WHAT IN ASGORE'S NAME IS ALL THE COMMOTION?" Edge shouted angrily from inside the house. "WHY ARE YOU TWO JUST STANDING IN THE DOORWAY?" Before Blue or Papyrus could answer, Edge spotted the human himself. "A HUMAN!?"