One day, Gabriel decided to eat grapes for breakfast. Unfortunately, the very first grape he had was overly-ripe. Upon eating it, Gabriel died, having fallen for a trap. His soul was instantly transported into some kind of dimension where a strange man informed him that his soul can no longer enter his body. But, luckily, all is not lost. The strange man tells Gabriel that he will become a Magical Girl...
Unfortunately, there is a catch.
....He'll have to kill the clone of his soul that is currently inhabiting his old body. If he doesn't, he'll be suffering for the rest of his life.
[Her nickname is the Magical Girl Of Suffering. If that doesn't give anything away then this will. Despite the story being relaxing in the beginning, I warn you things will get messed up]
(This is the editor of this series. https://www.scribblehub.com/profile/42145/quaoar/)