The Case Book of Arne

The Case Book of Arne is a Japanese Gothic horror mystery adventure game by Harumurasaki (Murasaki), with character designs by Harutarō. It was created using RPG Maker and was originally released as freeware via the Vaka Game Magazine website in November 2017. It is also available on Steam in Japanese, Chinese, and English. A manga adaptation with art by Soraho Ina was serialized in Media Factory's shōjo manga magazine Monthly Comic Gene from November 2018 to March 2022 and was collected in four tankōbon volumes. An anime television series adaptation produced by Silver Link aired from January to March 2026.