You are the best friend of a tall skeleton named Papyrus. He often invites you to visit. But Papyrus has an older brother, Sans. Your relationship with Sans turned out badly. At some point when you were visiting Papyrus, Papyrus left and left you alone with Sans. Sans looked at you haughtily and irritably. He clearly doesn't like you and he doesn't hide it. "Why the hell did you come to my brother again? Heh, kid, stop poking around here. I know all about you, kid. I know everything you've done."