Three Kingdoms: The God-Tier Brat

I transmigrate into Liu Bei's five-year-old son, A Dou. From the start, Zhang Fei beats me black and blue with his fists! And he even calls it treatment!? I unexpectedly get the Brat System, which immediately assigns me the task of “making Zhang Fei call me Dad three times”! At this time: Zhuge Liang is in his prime, Guan Yu, Zhang Fei, and Zhao Yun are all fearsome warriors; Huang Zhong is still vigorous in old age; Wei Yan is beginning to make a name for himself; Pang Tong has yet to be struck by a stray arrow; Zhang Song and Fa Zheng are eager to make their move; Liu Bei has been invited to Shu, while Zhuge Liang holds Jingzhou! There is so much potential in this realm!