Mental Synchronization

Anna can't sleep because of the awakened sky. Kristoff gets dragged along only to learn some slightly disturbing stories about his girlfriend, a villain, and...a love song? How one can sing a duet with a complete stranger seems to be the main question to a confused and *cough*jealous*cough* Kristoff. Fluffy(sorta)/humorous(kinda) oneshot of everyone's favorite couple: Kristanna