King of Ten Thousand Domains

Fang Jing had a beautiful childhood companion his own age, and the two of them grew up training together. They agreed to apply to Cangfeng Martial Academy together, but on the day applications opened, the girl disappeared… Fang Jing waited a long time, but she never showed up. Only after asking around did he learn that she had been recommended to the even better Xuantian Martial Academy. The person who had secured her recommendation was the eldest son of the Lin family, the greatest clan in Qingyun City…

[Traditional xuanhuan] + [Decisive and ruthless] + [No System] + [Vast worldbuilding]