Handplate {Sans x Reader x Papyrus}

[READ DESCRIPTION] This is far from drabble, but it's not an entire fanfiction either. It's something like a one-shot. Anyway, this is loosely based on the Handplates AU, except monsters are on the surface and W.D. Gaster is working on something nasty. He's taken in monsters and humans down to his lab, built right un...