Thank you both for your input!
I've been thinking about it and maybe taking the general setting of P5 (changing a few locations though) and a few other things such as using an app to travel to the shadow world while creating a different story that doesn't follow breaking into people's hearts...
I've been wanting to make a roleplay based on the persona universe, but I've been having troubles deciding what to do. On one hand I want to make a roleplay based on the world of persona 5, which would be easier, safer, and still as fun. But in the other hand I want to make an original world...