Marceline is a typical slacker with low grades and a hopeless future, but can she change when her best friend Bubblegum begins to lose hope for their friendship? And what if it takes Bubblegum to fall into the arms of another for Marceline to realize her feelings at all? MarcelinexBubblegum, Highschool AU [Taken from my Fanfiction.net]

Frisk has been followed around by Chara since they fell into the underground. After seeing Chara express a want for their body Frisk decides to give them their body back. Of course Chara can only have it under Frisk's watch.