it had been a month since the monsters got out of the underground, Papyrus's brother, sans, had fallen (died) a day before they got out. Papyrus carried his dust in a small necklace with him everywhere. He was still very upset and sad about his brother's death. He wasn't like he used to be. He was now less happy.

papyrus was walking back to his home with groceries when he bumped into a child

"OH! IM SORRY HUMAN! I DID NOT MEAN TO BUMP INTO YOU!"