Naruto: Uchiha's Bitter Fruit System

[Uchiha][Naruto][Konoha][System][No Mary Sue] Transmigrated into Naruto and became a member of the Uchiha clan. Originally planned to defect from Konoha before the night of the massacre, but unexpectedly at the age of fourteen, the Bitter Fruit System was officially activated. The deeper the regret, the more broken the oath, the richer the bitter fruit. Harvested [Hashirama's Broken Oath Bitter Fruit], rewarded with basic Sage Body. Harvested [Madara's Betrayal Resentment Bitter Fruit], rewarded with increased Uchiha bloodline purity. From then on, killed Danzo, fought the Third Hokage, and refused the clan's extermination. After that, the original trajectory of the ninja world gradually deviated. Using others' sins to rebuild the Uchiha's glory. Extermination? It has long become the most ridiculous joke in the ninja world.