Magical Otoge Iris

Iris works as a Purifier, a person who helps souls of the deceased move on to the afterlife. Her fate changes after coming into contact with the Magicians, half-immortal beings who watch over the MO worlds. Interacting with them, the mystery of the MO worlds' origins will come to light.

Don't be deceived by the lighthearted parts--despite the fun fantasy setting, MO isn't a world that will let you survive with something as flimsy as "the power of friendship."