How far should one go to be with that one person that makes their blood boil so much it burns a hole in their brain affecting their IQ? In a lawful society, one can only pursue their love interest without crossing the boundary of being labelled a stalker.
In a society like Hyesong if pursuing doesn't work some would resort to involving their families to get the bride or groom of their dreams. But what if both families object then what? What if an entire clan refuses to accept their clan leader's son marrying into an opposition clan with years of deep-seated hatred between them.
This was like some kind of Romeo and Juliet scenario with the only difference being that they were both men. They were well aware that they would be met with resistance in the future but Rui Fei simply chose to live in the moment while Ji Yao tried to delay the inevitable.