The key to life (An Inside Out Fanfiction)

We all know the main emotions; Joy, Sadness, Anger, Fear, & Disgust. But what if there is another emotion in Riley's head that is locked away somewhere?

An emotion that would get set free on her first, *AHEM* time of the month...

An emotion, that really isn't an emotion at all!

What happens when it gets set free?

Why is it locked up in the first place?!

And what IS the "emotion"...? Well friends, it's INSANITY!

She doesn't seem like any help to Riley, but when she gets visited by strange people claiming to be from a different dimension, and need HER help, everything goes to hell.

Universes are crossing over, the government is hiding something, AND THE WORLD IS ENDING!

And maybe, just MAYBE, to save the world, she needs to be a little insane...

[Fandom crossovers, (If you don't know the fandom, just go along with my weirdness)]

(An Inside Out Fanfiction)

WARNING
(contains strong language and mature themes such as menstruating. Also contains mature jokes that some people might find offensive. If you are one of the people who are highly sensitive to jokes or strong mature themes, reader discretion is advised.)