Juiro Minasaki, a 24-year-old student, lives in an emotional void, haunted by amnesia and suicidal thoughts since his parents' death a decade ago. His only connection is an online friend, Aiko. On the verge of ending his life, he saves a sorrowful woman, Minaki, who claims to be a forgotten childhood friend before disappearing.

This encounter shatters his apathy. Juiro discovers he grew up in Osaka with two sisters from a local shrine that mysteriously burned down the same night his parents died. His world then descends into chaos as he begins to teleport across the globe every time he sleeps. The terrifying ordeal is stopped by Hitane, who reveals she is the other sister and can control time.