A human girl enters OOO, no one who she is. But she is a born murderer, and her plans are to kill everything in OOO. Can our heroes stop her massacre? Cover is done by bostonbunny and here is the link: /art/Finn-x-Undertale-581390542 Note: Main characters of Adventure Time will die, so expect that.
Rated: T - English - Crime/Adventure - Chapters: 7 - Words: 14,519 - Reviews: 7 - Favs: 7 - Follows: 11 - Updated: 5/9/2017 - Published: 1/7/2017 - Finn, Jake, Sans, Chara