Note: A fantastical take on the Three Kingdoms, offering a very different experience.
Lin Yufan, a young man from the modern era, unexpectedly transmigrates to the final years of the Eastern Han dynasty and awakens the dual Mangekyo Sharingan. His left eye can devour space, while his right eye can turn intangible to evade attacks. When Cao Cao's army massacres a village, he uses his abilities to save the villagers and joins Liu Bei, working with Zhuge Liang and Pang Tong to transform the war-torn age. Using his Kamui dimension to transport supplies and turn the tide of battles, he helps Liu Bei seize victory at the Battle of Red Cliffs. After entering Shu, he drives technological innovation, bringing inventions such as the curved-plow and steam engine into use. He also introduces new systems and standardizes the currency, greatly strengthening Shu Han.
After Liu Bei becomes emperor, Lin Yufan leads the northern campaigns, sweeping through Cao Wei with Susanoo and steam-powered weapons. He takes advantage of turmoil between Wei and Wu to unify the Central Plains. Then he sets sail across the seas, conquering Nanyang and Tianzhu, and reaching the Americas, spreading Han institutions and civilization across the world. In the end, he establishes a global Han alliance spanning five continents. Once peace and order are secure, he chooses to seal away his powers and witness the golden age as an ordinary man. This Three Kingdoms era, rewritten by the dual Kamui, ultimately becomes a world where technology and civilization flourish together in harmony.