Synopsis: The World Exists for Me

After miraculously surviving a fatal train accident, Sekai Maihime is transported back in time where she discovers a hidden power linked to a mysterious doll named 'S.' However, her efforts to uncover the truth are hindered by 'S's' enigmatic guardian, Sovieul, who seems to have orchestrated her arrival in 17th century France. Despite his promise to protect her, Sovieul remains tight-lipped about the strange happenings. But things take a dangerous turn when Sekai and her companions encounter Machiavello, also known as the Devil, who bears an uncanny resemblance to her childhood love, Midou. Hoping to obtain the powers of Sekai and 'S,' Machiavello is determined to acquire the elusive Devil R's power. Meanwhile, Sekai is stranded in the past and struggling to find Midou while grappling with the consequences of her association with 'S' and the looming threat of Machiavello. To navigate the treacherous currents of time and reunite with Midou, Sekai must team up with 'S' and Sovieul, evading the dangerous Machiavello at every turn.