If you're looking for anime similar to Suicide Prevention Committee, you might like these titles.
Shiki ends up keeping a black cat while Mikiya Kokutou is out of town. Meanwhile, Ririsu Miyasuki, a student of Reien Girls’ Academy, suffers from the loss of her best friend who committed suicide by jumping off the Fujou Building. When she tries to kill herself, she encounters her classmate Asagami Fujino, who has psychokinetic power.
A boy arrives in purgatory after dying, where he is informed that in his past life he committed a terrible sin, and cannot be reincarnated until he can remember what it was. Until he does, he is placed in the body of a middle school student named Makoto who committed suicide three days ago, and is instructed to live the deceased boy’s life. New Makoto quickly becomes fed up with his host body's situation, as the boy doesn't have any friends, his family life is in shambles, and his mere presence makes everyone around him nervous. But giving up is not an option, and if the spirit ever wants to move on, he must adjust to Makoto's life and understand what happened in the past.
The two of them, all alone at home. All alone with her father's corpse. Memories, ideals, and reality all sink beneath the muck. Everyone is alone. Everyone is in solitude.