Synopsis: "X" Method In The Dead Of Night

Initially, Hiroki Kamiya envied his sister Yui's idyllic lifestyle spent gaming all day. This soon changed when he received an enigmatic message about a gender-bending technique. After a disagreement with Yui, Hiroki utilized this method to inhabit the body of a carefree girl. Unfortunately, his elation was momentary as he returned to his own body to find his sister lifeless and clutching a knife. With no recollection of the killer's identity during his time as someone else, Hiroki consulted Mikuni Mikuriya, a renowned idol. Hiroki sought justice for his sister's murder, whatever it took.