The King stared at Rei, his dance partner who carefully followed his dance steps without making any obvious mistake, he can't help but wondered if she learned to dance before when she was in Qin's palace. But after a short thought, he remembered that she was a high-ranked female official in Qin's palace, so it is quite reasonable for her to know a variety of skills that needed to be learned by ladies in the Qin Empire including dancing.
However, another weird thought raised in the King's head as he carefully observed her dance steps. With the assumption that Rei learned how to dance in Qin's palace, the King can't help but wonder if she could do that drum dance which was performed by Commandery Princess En Yu that day.
At this point, the King's head is fully occupied by those thoughts that he stopped his dance steps all of a sudden which caused Rei to accidentally stepped on his foot.
"I am terribly sorry, Your Majesty..."
"Ah... I'm sorry."