Under Tail: The Timeline that never was

What if I told you there was another story yet to be told?.. Another story totally Fan Fictional...
An Epic for all of time... A legend which Expounds upon a new AU...
This is the tale of a new Undertale AU, surrounding the usual characters, and featuring new ones!
This story is the story of five new characters and their connection to this AU. What may transpire is yet to be in store! Join us on a new adventure! We'll see you there soon!

*Note: It should be known that the above characters in this AU are above 18, There will be smut, sex scenes, and violence, but not in excess. This is it's own Alternate Universe, it is in no way affiliated with other AUs , nor does it follow the exact story of Undertale. This also does not encourage, or promote readers to try any illegal actions. it has a variety of themes including slice of life (life happens), etc. This story has a mechanic which shows two timelines occupying the same space and time. Depicting both Chara's and Frisk's point of views. it also uses Gaster as a narrator. Furthermore, no characters were actually harmed in any way in the making of this fanfiction.*