Angel Beats! is a finished anime series. It aired from April to June 2010 and has a total of 13 episodes.
However, if you're looking for similar anime, you might enjoy:
* Another: A supernatural mystery anime with a similar dark and emotional tone.
* Charlotte: Another anime with a focus on supernatural powers and the afterlife.
* Your Lie in April: A touching and emotional story about music and loss.
* Clannad: A heartwarming anime with a focus on family and friendship.