Despite being a noble-born, Tao has never liked the idea of slavery, so how did he end up buying Yifan through a slave auction?  Moreover, how did he end up falling in love with him? Is Yifan truly a man with no identity? Or is there something about his past that brings Yifan to him?  

Yifan asks for Tao's first dance on his birthday party, but Tao actually gives his first everything from that day onwards.    Prompt given by Mishtique