An alternate universe of Undertale, in which Frisk decides to stay underground for the rest of his days. DISCLAIMER: As well as the usual "I don't own Undertale or its content" spiel, I also make a few assumptions as to how the game goes. Frisk is male, and an old child - pre-teens. The run is a neutral run; alt...
The barrier is broken, monsters and humans are living in peace, everyone is happy except for one person. Frisk has been getting waking nightmares about not saving Asriel. They want to save him to erase all guilt and to be with their friend. But Asriel isn't the only one that needs to be saved. Something, someone lurks...
After Frisk goes missing, Caitlin, Frisk's twin sister goes looking for her in the the last place she saw her. MT Ebott, the mountain of dark legends, she finds a necklace that belonged to Frisk on the ground. Just like Frisk, Caitlin tripped and fell into the Underground. Caitlin finds things she never knew existed.
{Can everybody PLEASE stop reading this awful story so I don't feel bad about deleting it?!} This is an AU where all 7 human souls fall down to the Underground at the same time. DISCLAIMER: Several things I have decided on for this fanfiction. Toriel and Asgore got divorced after the death of Chara and Asriel and As...