Ep 1. Departure Angel Beats!

Angel Beats! Season 1 is an anime series that follows the story of Otonashi, a boy who has lost his memory and finds himself in a strange world with no recollection of his past life. In this world, he encounters other students who are in a similar situation, all of them have been sent to this world after their death. The world they find themselves in is known as the afterlife, where they attend a high school called the Afterlife Battlefront.

Season 1, Episode 1, "Departure," starts with Otonashi waking up in this unfamiliar world with no memory of how he got there. He is greeted by a girl named Yuri, who leads a group of students fighting against a mysterious girl named Angel. According to Yuri, Angel is the enemy and is trying to force them to accept their fate and move on to the next life, but Yuri and her group are not ready to give up on their lives yet.

As Otonashi tries to understand what is happening, he is introduced to the high school's unusual rules and structure. The students in this world are immortal, and they can't die as they're already dead. However, they do feel pain and can get hurt. Still, their wounds heal quickly. They have access to various weapons, and they use them to battle with Angel and her minions; this includes guns, swords, and even high-tech rocket launchers.

Otonashi is surprised to see this, but Yuri warns him not to get involved with Angel as she is extremely powerful and they have no chance of defeating her. Despite her warnings, Otonashi still decides to try and talk to Angel to understand her better and why she is trying to force them to move on.

During their first encounter, Angel comes across as a cold and emotionless person. She tells Otonashi that she is doing what needs to be done to make them move on to the next life, but Otonashi is not convinced. He also notices something strange about Angel's abilities; she has supernatural powers that no ordinary person can possess. Otonashi is curious about Angel and her true intentions, and he is determined to uncover her secrets.

As the episode progresses, the audience also starts to learn more about the other students' lives and their deaths. Yuri herself has a tragic back-story that she shares with Otonashi. She was a victim of a brutal attack, and she died while trying to save her siblings. This had a profound impact on her, and she is not willing to give up on her life so easily. The other students have similar sad stories, and they have all gathered together to find meaning and purpose in their afterlife.

At the end of the episode, Otonashi decides to join Yuri and her group and fight Angel. They plan to disrupt the high school's graduation ceremony, where Angel will make the students accept their fates and move on to the next life. Their plan is risky, and they know that Angel will stop at nothing to maintain order. But Otonashi and Yuri are determined to challenge Angel's authority and find their own way to understand their existence in this strange world.

Overall, the first episode of Angel Beats! is a thrilling introduction to this unique and captivating anime series. It sets the tone for the rest of the season, where the audience follows Otonashi and his friends' journey to uncover the truth about their lives and find a way to move on without giving up on their existence. The show is a perfect blend of action, comedy, and emotional drama, and it's sure to keep the viewers on the edge of their seats.