The Invader of Shadows

Would it go unnoticed if those close to you suddenly changed places with someone else? Recently, after receiving an email regarding such an event, Goichi began an investigation. There seemed to be a common feature shared among everyone who had been substituted; they spent most of their days working in front of a mirror. By chance, Goichi became acquainted with a beautiful young woman, Ano, a troupe research student. The “shadows” lead people to the mirror so they can trade places and survey humanity, and it would seem they sometimes kill the person and change places permanently. Furthermore, they have no distinction between good and evil, and do not hesitate to steal or murder.