(Cover Art is not mine.) You don't remember who you are, or who you used to be. You've woken up in an abandoned costume shop with amnesia, after the second human and monster war. The monsters were victorious this time, and practically all that's left of humanity is trapped in the Underground. You find a journal explaining how to survive trying to live among monsters, and you become aware that you are one of the less than ten humans still on the surface. Deciding to live among the monsters instead of risk it in hiding, you enter a monster-filled city, and meet a certain skeleton. Undertale: ©2015 Toby Fox. All Rights Reserved. TRAPPED - Gaster!Sans x Reader: ©2016 UndertaleReads. All Rights Reserved.