In a quiet countryside town, elementary schooler Hinagi harbors a secret crush on her classmate Ishidori. When she learns that he plans to move to Tokyo because he finds their rural life boring, she decides she must do whatever it takes to make him reconsider. To grab his attention and inject excitement into their daily routine, she undergoes a dramatic transformation into a striking, devilish figure. The story follows Hinagi's frantic, over-the-top efforts to liven up their town, all while grappling with the realization that her intense feelings are literally changing her—both in appearance and behavior. Love, in this world, has the power to turn a girl into a devil, and Hinagi's evolving relationship with Ishidori is at the heart of a fast-paced romantic comedy. Early narrative arcs focus on her initial transformation, the comedy of errors that follows, and the growing tension between her desire to keep Ishidori close and the unintended consequences of her actions. As the series progresses, it explores the theme of personal identity versus the overwhelming force of first love, and whether Hinagi can balance her true self with the devil she becomes.