A Thing Hiding In An Erotic CultA Thing Hiding in an Erotic Cult; Midara na Jakyou ni Sukuu Mono; Midarana Kakyou ni Su Kuu Mono; 淫らな邪教に巣喰うモノ; 盤踞於淫邪宗教之物

Tooru and his sister Yume end up in hospital after a traffic accident leaving their father brain-dead when suddenly Itou Yuuzen appears out of nowhere and takes them under his “religious cult's” protection. Is this the beginning of a new life for the brother and sister or something is hidden behind the facade of this religious cult?