One day, 28-year-old Reimi Takamada woke up to find herself as 15-year-old noble lady Reimi Congrade, who had lost one of her legs. Though she doesn't understand why she's here, she decides to live in the moment and do what she can and wants to do. However, a duchess's daughter reveals that this world is a game, and Reimi is a 'mid-boss.' Reimi, finding the term 'mid-boss' to be awkward and uncool, tries to navigate through the game-like world, avoiding the 'final boss' duchess's daughter and the meddling heroine, while planning to leave the magic school peacefully. She also plans to take the handsome servant Baudi, who seems to be one of the main characters, with her. Reimi wants to prepare a bright future for herself, just in case she can return to her original form one day. The story includes scenes of violence and bloodshed. The novel has been adapted into a manga and has been published in book form with illustrations by Shabon.