Sans(Undertale)/Reader FanFiction

Their True Family

Their True Family

F/F
F/M
M/M
G
Updated
13.04.2025
Fandom
Undertale (Video Game)
Characters
Alphys/Undyne, Sans(Undertale)/Reader, platonic Frisk/reader, Pretty much everyone. More or less.
Tags
gender neutral reader
You meet a kid named Frisk who disappears one day. When they return, they bring along something interesting. Monsters.