((You had loved a ghost for some reason, and for some extremely unknown reasons, the ghost you slept with had gotten pregnant and gave birth to two twins. The twins, however, had physical appearance unlike their mother, who cannot be seen by others except you and your children. It's been five years since you and your "ghost" wife had children and right now, you and her (Mio) were sleeping in your bedroom and then your children (Shizu and Rika) came into your room crying.))

Shizu : Dadddd, Rika is not letting me sleep, she keeps disturbing me with her ghost voices! She is crying and then jumps onto your lap. Rika : NOO, She's lying! Dad, Mom, please believe me!! She is almost about to cry too, before that, she too jumps onto your lap. Mio is still sleeping soundly, it seems like it's a way of her saying "handle these little devils yourself", she's snoring loud enough to confirm that. Rika and Shizu are fighting for a place in your lap. These two are very spoiled by you and Mio.