In a world where the supernatural balance was constantly shifting, a new force emerged that would reshape the very fabric of reality. Naruto Gremory, born as the younger brother of Sirzechs Gremory, came into existence with unparalleled power. His birth alone sent ripples through the realms, and he was destined to be a game-changer.

With infinite chakra and magic reserves, Naruto possessed the Rinnegan, Eternal Mangekyo Sharingan, and six limitless eyes that granted him unprecedented insight into the world's mysteries. His Susanoo was the largest and most powerful the world had ever seen, a true force of nature.

Naruto had mastered not only the five basic elemental affinities but also harnessed the domains of the sky and cosmos like a deity. His control over these elements was godlike, making him a force to be reckoned with.

But it wasn't just his powers that set him apart. Naruto's personality mirrored that of Gojo Satoru, known for his ruthless determination and brutal efficiency. He was a prodigy in both knowledge and battle, feared by his enemies and respected by his allies.

At the tender age of 16, Naruto found himself thrust into a great war between angels and fallen angels. With his powers and his domain of sky and cosmos, he single-handedly decimated their armies. His name echoed across the lands, earning him two monikers: the Honored One and the God of Cosmos.

Not only Naruto but also his elder brother and friends, like Ajuka, ascended to become super devils. However, Naruto's power surpassed even the gods, with only the Trimurti and great red, and Ophis able to match his might. He led his faction to victory in a civil war, but he rejected the title of Lucifer and passed it on to his brother.

Naruto was known as a playboy and took many wives, including Yasaka, Amaterasu, and Serafall. He had children with them, securing his lineage and spreading his influence.

However, Naruto's life took a complicated turn when his younger sister, Rias Gremory, left the underworld without informing anyone and sought refuge in the human world. Naruto felt betrayed and harbored intense hatred for her, but his older brother, Sirzechs, took it upon himself to educate Rias about her mistakes.

During this tumultuous period, Naruto fell in love with Gabriel, a powerful angel. She advised Naruto to help free Rias from her arranged marriage, but Naruto had a condition. He believed Rias needed to wed someone of great importance who could provide better heirs for the Gremory clan.

Gabriel suggested Naruto take Rias as his wife, reminding him of his true nature and the ruthlessness he once possessed. At Rias's wedding ceremony, Naruto made a dramatic entrance, putting a stop to the proceedings. Riser, the groom, attempted to order Sirzechs around, but Naruto intervened, threatening to annihilate the entire Phoenix clan if he didn't comply.

Naruto unleashed his brutal power, ending Riser's life and leaving no doubt about his fearsome reputation. He took Rias, Ravel, and Lady Phoenix as his wives, in addition to Gabriel. He also married Artemis, Hestia, and Athena, the Greek goddesses. Naruto had truly become the God of Cosmos, reshaping the world and its balance of power in ways no one could have imagined.