Uphill - Faithtale AU (Sans x Frisk)
When Sans gets the opportunity to pursue his dream job under a famous scientist, he takes it, like any sane person would. The first few weeks, everything is great, until he catches on that something isn't right.--------------------Credits:FaithTale AU belongs to @momoishy and @smollvivi on tumblr. Undertale belongs to TobyFox. Art is by @kaitogirl on deviantart.Stunning cover is by @rileh_ on wattpad.…