Yakushiji Ryōko no Kaiki Jikenbo(薬師寺涼子の怪奇事件簿, lit. "Ryōko Yakushiji's Strange Case Files") is a series that consist of the TV anime, manga and light novels created by Yoshiki Tanaka and illustrated by Narumi Kakinouchi. Two Drama CDs had also been released prior to the anime adaptation with different seiyū from the CD and the TV version. As the light novels, manga, drama CDs and anime adaptation have different plots and paranormal events/creatures, their central plots are most of the time different from each other.