Throughout Japan, pockets of self-contained dimensions called Phenomenon are appearing due to intense emotions. These false realities overwrite the real world and can only be undone by defeating or appeasing their creator. To combat them, a military-sponsored task force called Trinary has been formed, consisting of three members who specialize in diffusion: Miyabi Koigasaki, Gabriela Lotaryńska, and Ayami Kunimasa. During her favorite idol's concert, Tsubame Ouse gets caught in one of these Phenomenon but is saved by Trinary's timely arrival. After this incident, she joins Trinary, along with newcomer Kagura Uzuki, as they handle each new Phenomenon. As they navigate through their daily lives and responsibilities, the girls slowly realize that their reality has a unique set of issues to balance.