In a world filled with various living creatures, there was a teenage boy named Diego. However, Diego was no ordinary teenager; he hailed from a renowned vampire family with extraordinary powers. What made him truly special was his Crimson Eyes, eyes that originated from the Demon God, a mysterious entity that created the world where Diego lived. This world was inhabited by diverse beings, ranging from demons, humans, elves, dwarves, to half-animals, and more. Those who managed to reach a certain level of power could be called demigods, and Diego inherited the eyes from the Demon God. These eyes possessed tremendous power, allowing him to manipulate blood and his own body to achieve twelve magic circles. Magic played a crucial role in this world. Diego, an unforgettable teenage boy, was reincarnated as Mirai Valontier, a member of the prominent vampire family in the Kingdom of Sylvanor. His father, Fiero Valontier, was an immensely powerful vampire, reaching demigod status, and was a close friend of the current King of Sylvanor. His mother, Viona Valontier, was a relative of the current Emperor and the third princess in this influential kingdom. However, Diego experienced a tragic death in the past, caused by fear and envy of his rare ability. His eyes, known as Crimson Eyes, had the power to achieve twelve magic circles, while other creatures were limited to nine circles. Only dragons could reach ten magic circles, making him the only one with such capability. However, a conspiracy by the "Nine Constellations," including Gilgamesh, the human god, prompted other gods to hunt Diego. Diego vowed to seek revenge on the Nine Constellations and reveal the true nature of the gods.