Naruto: the Most Stable Clan Leader, Who Dominates the Ninja World by Having Children

Traveling through Naruto, it happened to be the night when the Uchiha clan was exterminated. Uchiha Tei had a chance to fake death and escape, and awakened to the system of becoming stronger after being born against nature. He and Sasuke were the only two people left in the clan, and their bloodline was on the verge of being severed. With Uchiha's trillions of wealth accumulated over the past century, he abandoned the old path of practicing martial arts and spent heavily to recruit high-quality kunoichi to continue his bloodline. Every time a clan member is born, they can unlock chakra and top-level ninjutsu, gradually strengthen the clan, resist the calculations of Konoha's top leaders, crush all coveting forces, and restore the glory of Uchiha.