UndertaleAu FanFiction

The underground of the Underground

The underground of the Underground

F/F
F/M
Gen
M/M
Multi
Other
G
Updated
13.04.2025
Fandom
Undertale (Video Game)
Characters
Sans, Papyrus, Frisk, chara - Character, Toriel, Alphys, Undyne, Asgore, Gaster, Mettaton, Grillby, Asriel,
Tags
Fluff Angst Past Child Abuse Implied/Referenced Child Abuse Past Relationship(s) Drug Use Racism trigger warning Under!mob UndertaleMob UndertaleAu Inspired by a comic
What if human souls weren't stronger than monsters? What if they were in fact weaker, and humans had lost the war? A new world of possibilities.Sans and Papyrus are two fun-loving gangsters just living life in the mob run Underground. There are many...