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Summary
Swapfell based fic.
You didn't plan to be trapped in the underground, not that you had gotten the chance to see much of it before you ran into a skeleton monster by the name of Papyrus. He seemed nice--which from the little bit you had seen of this place was a rarity. He was ecstatic to meet you, even more so to introduce you to his brother Sans. Though he did warn you before meeting him that you should only address Sans as "My Lord" or "Lord". Despite your initial hesitance at this fact, Papyrus seemed to think the world of his brother. After all, if Papyrus was okay, how bad could his brother really be?
