Masharu Jakki is a reclusive high school student drifting through life without much purpose. Her uneventful routine takes a dramatic turn when a mysterious figure appears in her dream, warning her of a looming death. Unless she signs a life-altering contract that will change her life forever. This agreement binds her to a surreal realm each night, where she must fulfill the figure's bidding. This precarious agreement blurs the lines between reality and dreams, forcing Jakki into a struggle to understand her mission while she races against time to rewrite her destiny.