Humanitarian vampires are looking for suicide volunteers

Sasha has faced a serious problem since she was a child: she is a vampire, but she has no way to attack humans. Her family has been trying to get her to accept her nature, and she has been surviving on plasma. One day, she met Paul, a young man who wanted to commit suicide. Paul has been bullied and criticized by people around him for a long time, and feels despair about the world. He decides to devote his life to Sasha after fulfilling his last wish to help her regain her nature.