Ayaka Manabe

One day, Naho Takamiya receives a letter written to herself from ten years in the future. As Naho reads on, the letter recites the exact events of the day, including the transfer of a new student into her class named Kakeru Naruse. The Naho from ten years later repeatedly states that she has many regrets, and she wants to fix these by making sure the Naho from the past can make the right decisions—especially regarding Kakeru. What's more shocking is that she discovers that ten years later, Kakeru will no longer be with them. Future Naho asks her to watch over him closely.

A new hunter, Bloody Queen, arrives at the manor. Due to her expectations of royal treatment, she has trouble adjusting to life there. The Survivor Eli Clark reaches out to her, but in her tempestuous state of mind, she lashes out at him, and he becomes trapped in a mirror world. In the mirror world, all of the hunters and survivors have been reflected as courtiers and servants in the queen's castle. They do not remember their pasts, but Mary will not let the illusion break so that everyone can return to the manor. But under the glistening surface of constant parties and pleasure, a plot is brewing, and Eli realizes that he must convince Mary to let her illusions go before it is too late.

The survivors and hunters were engaged in a mysterious game within the manor. A prospector seeking golden "treasure" and a night watchman obsessed with "complete victory" meet, clash, and continue to fight, each burdened by their respective "pasts." At the end of this never-ending zero-sum game, where can we find the "light" of salvation? Those who try to crawl out of the darkness and those who try to embrace and protect the darkness Will they be able to have it all? Or...