Rikka, Chiyo, Sekine and Tsubasa seem like regular middle-school girls, but they all have their own secrets.

What was supposed to be a fun visit to the karaoke studio suddenly turns into an emergency when the four friends are abducted by a shadowy organization.

Time is running out. The lies are not holding. When the truths comes out, can the four kids remain friends? Can Rikka stay on Earth, without messing with the space-time continuum?