After erasing himself from the throne of heroes Romani aka Solomon finds himself flung into a different world but not before his clairvoyance reveals to him the enemies Ritsuka and mash have to face are a lot stronger than they could ever imagine.
He then makes it his mission to return to his world to help ritsuka and mash once more, but to do that he must travel across worlds to get closer to his own.
Who knows maybe he'll find some new friends along the way?
Now if only Goetia would stop sulking