You're trapped in a magic box, and a young girl named Kyoko has possession of it, one day she accidentally used it on her male friend, the magic box traps a soul in it and to bring that soul back to freedom was to use another body for it... She knew she didn't had anyone for it except her 14 year old sister. A few minutes later...

Kyoko: "Oi Shaden, wake up...!.. Look im really sorry... Cmon wake up..."