In this series the romance is very minimal so even when something does happen, it is enjoyable to read. He may do much of what he does for her or because of her as an undertone to the entire story yet it is never in your face. YY is way to reserved.
As far as I can remember, this chapter only has the perfect romance. It's not really ruining anything but it adds up to the story. Now, we can say that Yuan Zun has feeling for Yaoyao. Who would have thought that he would kissed Yaoyao after 300+ chapters?
Usually in action fantasy they somehow ruin the story by adding unnecessary romance but they are quite cute and she isn’t a damsel in destress