Anime Crossover: Kirei's Adopted Son, Gilgamesh, Rules Uruk

During the great fire in Fuyuki, the one who saved the boy was not Kiritsugu Emiya, but Kirei Kotomine and Gilgamesh. Shirou Emiya, who should have become a "Champion of Justice," instead became Shirou Kotomine, the adopted son of a pleasure-loving priest and an arrogant king. He mastered the Eight Extremes Fist, Jewel Magecraft, Projection, and Reinforcement, and inherited their sharp tongue and scheming nature to perfection.

At fifteen, he transmigrated to the most perilous Singularity in Type-Moon: the Absolute Demonic Front. The Wise King Gilgamesh acknowledged him as his son and sent him to the northern wall to fight monsters. Leonidas taught him troop command, Tomoe Gozen taught him how to kill enemies, and Merlin custom-made three Mystic Codes for him.

When a monster horde appeared with an intelligent commander, the northern wall was on the brink of collapse. He made a solo overnight dash back to the royal city to deliver the news, then accepted a mission to seek strength in another world.

In the world of Fairy Tail, he encountered Lucy, a Celestial Spirit Mage, and set his sights on becoming part of the strongest guild. An adopted son of Uruk, a mage from another world, and the future king of Uruk: burdened with all these identities, he lived by one creed: justice belongs only to those with strong fists.

Across the Myriad Worlds, whoever shows up gets beaten.

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.