[It's been an exhausting day, on top of an exhausting multiple days. Papyrus is tired, too - and more than that, he wants to sleep. With settling in for the somewhat dry information about constellations, closing his eyes and relaxing as best he can, the sound of Sans's voice going sleepier is contagious. Soon his breathing settles down in a way that means, if he's not outright asleep, he's doing and well on his way there.]
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