Mangekyō Awakening: Leaving the Leaf with Madara

[No System + Naruto Fan-Fiction + Uchiha + Battle + Behind-the-Scenes Boss] [Single Female Lead, but Uchiha Hikari] "That day, not a single clansman was willing to follow me..." In the early days of the Hidden Leaf Village, Uchiha Madara left the village. Before leaving, he called upon the entire clan, but in the vast Uchiha territory, not a single person was willing to follow him... Just as he was disheartened, a young boy stood up! Madara was shocked to discover that the boy, at such a young age, had actually awakened the Mangekyo Sharingan! Not only was the boy's strength heaven-defying, but he also knew the whereabouts of the Uchiha's secret weapon from many years ago - Uchiha Hikari! And so, three Uchiha formed a new team... Many years later, Shin'yu reached the summit, gazing at the Allied Shinobi Forces below the mountain, and the Otsutsuki Clan in the sky, a slight smile on his lips. "Lord Madara, back then your fists weren't fast enough, nor ruthless enough..." TL Synopsis: Uchiha Nen, orphaned and ostracized within the Hidden Leaf Village due to his father's betrayal, seeks strength to overcome his pariah status. He befriends Uchiha Tong Ren and Orochimaru, yearning to become a powerful ninja. Meanwhile, Uchiha Madara, disillusioned after losing the Hokage election, prepares to leave the village, believing peace is unattainable. He encounters Uchiha Shin'yu, a young prodigy who shares his ideals and hatred for the Senju clan. Shin'yu, a transmigrator with the Mangekyo Sharingan, manipulates Madara, revealing his unique eye techniques: Mahoraga (infinite adaptation) and Ame no Tokotachi (space-time reversion). As they depart, Shin'yu secretly plans to revive Uchiha Hikari, a sealed Uchiha with the Yachihoko. He manipulates Kakuzu into joining him, demonstrating his ruthless nature. Shin'yu infiltrates Hidden Leaf, steals the Warring States Sealing History, and escapes, facing betrayal and battling Tobirama Senju. He then joins Madara, setting the stage for a new Uchiha faction. The narrative also explores Orochimaru's early life and his fascination with immortality, setting up future plotlines.