After Frisk goes missing, Caitlin, Frisk's twin sister goes looking for her in the the last place she saw her. MT Ebott, the mountain of dark legends, she finds a necklace that belonged to Frisk on the ground. Just like Frisk, Caitlin tripped and fell into the Underground. Caitlin finds things she never knew existed.

There once was a child, an acolyte of faith, a child who believed in the magic of gods, One day, they called out to them, desperate for help, with their determination they stood tall, but the wrong ones came, They reached out to call once again, But nothing happened, standing before them, was a creature of darkness, They stood, with determination and faith, yet.... In the end, their blood was spilled... And thus became....the lost soul.. I do not own the Reapertale AU, all rights go to Renrink. Also, if you have not read any of the Reapertale comics, I highly suggest you read them, thus you will not be able to understand this story. All comics can be found on Renrink's tumblr. :)

Welcome to the genocide run. Over. And over. And over again. Sans is about sick of killing, and dying, and watching his friends die. So he's not gonna put up with it anymore. Sans comes up with a plan, and hacks the codes in order to create a better ending. Let's see where that gets him.

In my classroom... there was this particular boy.

I'll take a crack at writing some Undertale. Please enjoy! (One shots and X readers)