Anyone unaware might assume she was doing a set of aerobics on Tang Zan's back.
That's what made Tang Zan feel she was moving too vigorously, so much that he couldn't stand it and had to slap her... butt.
But she was truly innocent, even the way she gathered her clothes was careful and cautious.
If it had been modern times with pole dancing, strip dancing, or street dancing, wouldn't Tang Zan be even more irritated?
He might have drawn his sword to cut someone.
Yet, thinking of this man's capricious nature, and the fact that there were no romantic lines for him in the book.
The only emotional entanglement was that he was the man the female lead initially had feelings for.
This unpaired villain might really do something like cutting people down if he saw modern dances.
Pei Shu'er stopped moving, obediently lying on Tang Zan's shoulder like a docile kitten.