Summary:

This story is set after Frisk/Chara have completed the Genocide run, and instead of resetting, altercations caused Frisk to perish leaving the evacuated monsters to eventually return to the underground. After a few months, another human falls in to the underground, and will have to face the aftermath of what Frisk/Chara left for them.

To keep in the style of Undertale, this story is technically three stories in one. Depending on which route you'd prefer to take, you can choose to go Pacifist, Neutral or Genocide on the monsters you'll meet. Beginning similarly, each path will diverge ultimately leading to three different endings, (four if I decide to add a 'soul-less pacifist ending'). Alongside this, I will probably be following how each route plays out in the actual game, with added adventures in the Pacifist story, and shortened dialogues/events in the Genocide story, excluding any differing boss battles of course.

Warnings:

This story will have themes of death and thoughts of suicide. Nothing too drastic, pretty much the same amount that appears in the actual game. As the Genocide route is obviously the more deadly route, expect more death and thoughts of suicide to show up in that story.

As stated above, this story is set Post-Genocide. As this is the case, most of the original main characters will not be present. I doubt I will include W.D. Gaster in this either, as nothing is really explained about him, and if he didn't care to show up when Frisk was killing everyone, I doubt he'd show up now.

I guess I should also mention that the main character will be based on you, making this a reader-insert I guess? As this is the case, the main character isn't given a name or a gender so that's up to you to answer. There may also be a few minor OC characters. Nothing too obnoxious, basically filler characters due to Frisk/Chara killing so many of the original cast. However all major characters in this story will be original Undertale characters.

Shameless Plug:

If you have any questions, thoughts, ideas or opinions, feel free to leave them in the review section. It helps show that people are actually reading my story and are interested in reading it, which is a big motivator. I'm happy to receive constructive criticism, but I won't be paying any attention to flat-out hate.

Disclaimer:

Undertale and all it's characters are owned by Toby Fox.