On his way back home from the convenience store, Subaru is suddenly brought to another world and he tries to figure out what has happened.

After multiple fatal encounters, Subaru realizes he has the power to return to a set point in time upon death, which he calls 'Return by Death.' Determined to change fate, he tries to retrieve a stolen insignia from Felt and return it to Satella before the assassin Elsa strikes again. Despite his efforts, Elsa arrives early, and chaos ensues, forcing Subaru to fight for everyone.

Subaru's first day at Roswaal's mansion begins for the third time. After dying mysteriously twice, he plans to uncover the killer by staying awake on the fourth night. What he discovers shocks him—an unexpected attacker strikes, and he dies again. Revived once more, Subaru survives past the deadly night for the first time.

Cursed after saving the village children from Ulgarm, Subaru faces death within hours. Beatrice can't break the curse—only the pack’s destruction can save him. As Subaru nears despair, he learns Rem has entered the forest alone. After a painful memory surfaces, Rem confesses her guilt. Cornered by Ulgarm, Subaru sacrifices himself to draw them away.