Smut one-shot for Undertale characters. Yep, this is happening.

Admin: //Yes, I am a filthy sinner. And so are you for reading this book! Enjoy, my fellow Undertale trash. Universes included: Undertale Underfell Underswap Outertale (maybe) Errortale (maybe)

Your skeleton boyfriend, Sans, calls you on your recently upgraded cell, telling you it's urgent. He sounded ill, so you rushed to the Underground as quickly as you could. Upon your arrival, you see Sans sprawled out on the couch. His skull is burning hot, and his face is tinted a light blue. He begs for your help, and you're filled with DETERMINATION. However, ice cubes couldn't make Sans' temperature go down, and to make things worse, Sans keeps making weird noises that you've never heard before... You start to realize that this MIGHT not be a fever, after all...

Just look at the title :3