Shigofumi: Sore kara

The main characters are similar in the sense that they deliver messages from those who died and generally try to reach some closure, though one is a shinigami (reaper) and the other has the job of delivering shigofumi (letters from the dead). Iin Ballad it's not always about someone who died, but it could be someone who was close to dieing, but they are both about reaching closure. There's a sense of mystery to each episode presenting situations that are revealed and influenced with the interference of the main character as an "outside" entity.