A high school student, Satoshi Kurume, who was born and raised in a family whose livelihood is devilishness.
Although he grew up receiving demon extermination and demon extermination from his father, few people nowadays believe in "unscientific" things such as spirits and youkai. I didn't really care about it.

Meanwhile, Arashi Yuri, a college student who newly joined as a colleague at a part-time job, feels uncomfortable.

(I feel like I have something ...)

Arashi, who is a type that is easy to be possessed, happened to be her sister, Ritsuka's, boyfriend.
When Ritsuka, who is away from her hometown, asks for Arashi, she will watch over Arashi as a devilish master.

[Translated from Freem!]