Ongoing A Thing Hiding in a Erotic Cult; Midara na Jakyou ni Sukuu Mono; 淫らな邪教に巣喰うモノ; 盘踞于淫邪宗教之物

Read A Thing Hiding in an Erotic Cult Manga:
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?