its basically an anime where People who had a unfair life before they died and instead of going to either heaven or hell they are sent to Limbo which is in the middle and Limbo is actually a highschool academy. If you have a peaceful time your soul goes to rest and you leave Limbo to be reborn. but in the Anime the cast is trying to leave limbo but not following the rules of the school and they are being hunted by a girl called Angel who is trying to keep order in the school. If you havent seen the Anime its very short so yo ucan finish within a day so i would watch it. Its very good