Moriguchi Orito no Onmyoudou

is a Japanese light novel series written by Masaki Okayu, with illustrations by Torishimo. The series began publication on August 10, 2008 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Haruka Nahara Hatsuki, a daughter who has an unnecessary ability in life that her erotic delusion leaks to the surroundings. Orito Moriguchi, who has been concerned about her since the transfer, makes a promise with Hatsuki in the wake of a sudden event. The promise is to "protect Hatsuki (from her own erotic delusions)."

"I will definitely protect you (from erotic delusions) ...!" \ The weaver who decides so firmly decides to go out to exterminate youkai with Hatsuki, who is also a descendant of the Onmyoji clan.

However, as a matter of course, her lewd and dreamy thoughts afflicted Hatsuki ... !!