Kanan-sama wa Akumade Choroi follows Kanan, a demon who descends into the human world determined to taste the sweetest delicacy of all: young human souls. To get close to her prey, she disguises herself as a high school student and targets Youji Kyougi, an ordinary boy who should have been an effortless first meal. Instead, an unexpected turn of events leaves the two bound by a "romantic contract", turning Kanan's hunt into something far more complicated than she ever intended.
For a demon who has spent millennia untouched by love, everyday school life becomes a trial of its own. Kanan finds herself navigating awkward dates, accidental hand-holding, and feelings she cannot immediately name, while Youji remains at the center of a relationship that keeps slipping beyond her control. What begins as a simple predation quickly turns into an uneasy daily routine filled with embarrassment, confusion, and growing attraction, as Kanan is forced to confront a world where romance is both baffling and dangerously real. The more she tries to keep her mission on track, the more human emotions complicate every step, making the line between hunter and prey harder to define.