Haruka Nagano, an office worker who works in Asakusa and a side business onmyoji. Haruka, who looks around the town of Asakusa on her way home from work every night, is a heppoko as an onmyoji, but she aimed for the coexistence of mystery and human beings with her unique technique called "Sweet Harae".
One day, her new boss comes from Kyoto to her Haruka department. What a handsome and talented man, Chief Hasegawa! It was a demon that was the enemy of Onmyoji. She was Haruka who was on the utmost caution, but for the sake of mutual peace, she began to confront the mystery with Hasegawa, even though she was a forbidden combination of a demon and an onmyoji.
However, Hasegawa was injured by protecting Haruka in an incident involving a mystery. And she realizes that Haruka feels for him ...
A new employee named Ayataro Momoya appears in front of them. Haruka, who was entrusted with the education of Momodani, is confused by the enthusiastic and open approach from Momodani for some reason. Hasegawa tells her not to forgive Momodani, and she is Haruka, who is sandwiched between a new younger boy and a "demon" boss.
Set in Asakusa, a dangerous romantic comedy, the third release, unfolded by a side-business Onmyoji and a demon (← real) boss!