In the beginning there were two beings the God of creation and the God of balance, with the emergence of Satan and humanity's fall the balance of the world broke and the only one who can reestablish it is the God of balance, that is why he will create seven people out of certain aspects of his personality that are the 7 deadly sins and make them absorb the essence of 7 fictional worlds to solidify the seal that was broken because of Satan.lots of r-18 only for the Lust part of the sins while for the others there will be only some lines explaining the act