After the True Pacifist ending, the monsters (and Frisk) make sure that all the monsters have been moved out of the Underground. While making their way around The Ruins, Frisk and Flowy stumble upon another path they didn't know about that was exposed in a minor earthquake. While exploring, they fall into a new hole… into a whole new world. A world with more magic… and more monsters… than the Underground ever dreamed of. With strange new magic and powers all around, will the humans and monster Prince make friends… or leave a trail of dead behind them?

*Warning*: Contains spoilers for those who haven't played Undertale. Also has gratuitous swearing. Rated M for (non-graphic) violence and possibly later "mature scenarios". Also some [spoiler]awkward nudity[/spoiler]. I added the 'SEX' tag just to be safe [spoiler]even if there will be no graphic depictions of sex acts. Just some heavy kissing, cuddling and feel ups. There will be moments of Frisk/Chara, Frisk/Asriel and Asriel/Chara. Other ships may occur in later chapters.[/spoiler]