Regular high school student Subaru Natsuki was walking home from the convenience store one day when he suddenly found himself in another world. Thrown into this unknown new world, a bewildered Subaru is offered a hand by a beautiful silver-haired girl. Wanting to pay her back for saving him, Subaru ends up helping her search for something she’s lost, but things are not so simple. Once powerless, he suddenly finds in his hands the ability to rewind time if he dies. In order to protect those whom he cares about, and to take back the original time that he knows existed, he will stand up against a cruel fate and fight despair.