The Spiked Drink - Undertale AU- (Underfell Papyrus X Reader)

In the world of underfell. Everyone is of course, not friendly. Frisk is your best friend so she invited you to check it out. She warned you that it was pretty bad but you didn't care. You lived in a rough neiborhood so it was cool. Eventually you got in a party and you were offered a drink. You drank it, not knowing that Grillby Spiked it, and you got more and more. You passed out. But where you woke up......wasn't what you expected.