Okay, that's gonna sound weird, but here's the basic premise.
One God, the Golden God has come to collect the debt of another God, The Silver God. Said God defaults on the debt, but offers something in trade: pointing towards the site Roleplayer Guild, he says how people can be pretty good if they are motivated and powered up.
The Golden God obliges and recruits some users to work as employees for his Odd Job Guild. Basically, there's a guild devoted to taking care of odd jobs, ranging from escort missions to outright assassination missions.
Helping them, the Golden God gives them powers based off works that these users enjoy. So, for example, my OC would be given, say, Kamen Rider powers. And stuff like that.
You don't have to play as yourselves or other RPG users. In fact, you can play OCs with a false account on RPG. I'm probably considering some of the missions to be user-submitted.
So, in a sense, it's a Multiversal Crossover RPG, but instead of Canon characters, we're playing people from Earth who have acquired Canon powers.