After defeating the evil Bookmaker Kou Satomi, Suzuko Homura and Chinatsu Morikawa can finally go back to their normal lives and move forward. Unfortunately, their peaceful days are numbered, as Kiyoi Mizushima asks Suzuko to help stop the next cycle of Selector battles. Even though Satomi is defeated, his plan continues to threaten their world. Anxious and uncertain about the situation, Suzuko decides to help Mizushima investigate, unwittingly entering a battle that will decide the fate of all Selectors.