Subaru wakes up in front of the appa shop once again. Feeling boxed in on all sides due to his own lack of power to change the situation, he seeks the help of others. First, he seeks the help of Crush, who flatly declines any further involvement passed her contractual obligation of healing Subaru. His requests to Anastasia and Priscilla similarly go unanswered despite his pleas. Having wasted too much time, Subaru decides to at least try to get Emilia away from Roswaal's mansion as early as possible. He then takes a dragon car back home with Rem.

Suddenly, high school student Subaru Natsuki has been summoned to another world on the way back from the convenience store. With the biggest crisis of his life being summoned to another world, and with no sign of the one who summoned him, things become even worse when he is attacked. But when he is saved by a mysterious, silver-haired girl with a fairy cat, Subaru cooperates with her to return the favor. When they finally manage to get a clue, Subaru and the girl are attacked and killed by someone. Subaru then awakens in the place he was summoned and notices he gained the ability "Returns by Death" and has become a helpless boy that only has the ability to rewind time by dying. Beyond the despair, can he save the girl from the fate of death?