"Magimoji Rurumo" centers on Kouta Shibaki, a high school student with a reputation for being a pervert due to his habit of peeking at girls. His life takes an unexpected turn when he encounters Rurumo, a witch-in-training who grants him a set of magical tickets. These tickets allow Kouta to make wishes, but each use comes at a cost: for every ticket used, a portion of his lifespan is deducted. Initially, Kouta uses the tickets frivolously, but as the consequences become apparent, he begins to approach them with greater caution.

Rurumo, the titular character, is a kind-hearted but somewhat clumsy witch who is determined to prove herself to her superiors. She forms a bond with Kouta, and their relationship evolves as they navigate the challenges posed by the magical tickets. The story explores themes of responsibility, sacrifice, and the value of life, as Kouta learns to balance his desires with the serious repercussions of his actions.

Supporting characters include Chiko, Rurumo’s familiar, who often provides comic relief but also serves as a voice of reason. Additionally, Kouta’s classmates and other witches add depth to the narrative, creating a blend of humor, drama, and supernatural elements. The plot progresses through a series of episodic adventures, with overarching developments that delve into Rurumo’s past and the broader magical world.

As the series unfolds, Kouta and Rurumo face increasingly complex challenges, including encounters with other witches, magical creatures, and moral dilemmas. The interplay between the mundane and the magical is a recurring theme, highlighting the contrast between Kouta’s ordinary life and the extraordinary circumstances he finds himself in. The narrative maintains a balance between lighthearted moments and more serious, introspective scenes, creating a dynamic and engaging story.