Ep 21. A Wager That Defies Despair

Subaru, with the help of Wilhelm, is able to find the demon beast that has been causing chaos in the castle. Upon defeating it, they find out that Rem has been swallowed by the beast and is in critical condition. Subaru frantically tries to save her, but is unable to heal her injuries with his limited knowledge of magic. Emilia and the others arrive and decide to take both Rem and Subaru to the capital for proper medical treatment.

While on their way to the capital, Subaru confides in Emilia about his power and how he keeps returning to the same point in time every time he dies. Emilia is shocked by this revelation and doesn't quite understand the gravity of Subaru's situation. Subaru, feeling frustrated and helpless, proposes a bet with Emilia to prove the veracity of his power.

The bet is simple - Subaru will ask Emilia to kill him and he will return to life after his death, proving that he has the ability to "respawn." Emilia is hesitant to participate in such a dangerous bet, but Subaru insists and eventually convinces her to do it.

Subaru dies at Emilia's hands and, true to his word, returns to the same point in time. However, he quickly realizes that his actions have consequences. The events that follow force Subaru to confront and come to terms with the reality of his power and the lengths he is willing to go to protect those he cares about.

As the group reaches the capital, they are greeted by a group of mysterious figures who seem to know about Subaru's power. Subaru is at a loss and begins to experience overwhelming despair at the seemingly insurmountable obstacles in his path.

Episode 21 of Re:ZERO - Starting Life in Another World - is an emotionally charged episode that explores the consequences of Subaru's power and the lengths he is willing to go to protect those he cares about. The episode poses difficult questions about the nature of fate, choice, and morality, making it a must-watch for fans of the series.