When nighttime came, Sato arrived with extra help. He was also assigned to make sure that the children looked their best for the night. They knew that there would be many reporters at the concert and they could not have the children going there looking like step-children.
The EXODUS members had left first before the children because they had to prepare and meet and greet VIP fans before their concert.
Sato had to call in asking for reinforcement from Ann when he realized that he didn't have enough people to help him. Ann sent over the crew that usually took care of her. From make-up artist to stylist.
With that, it freed up some time for Sato to take care of all the boys.
It was much easier since there were only James and Jeffrey that he had to worry about. However, he later found out that three other Royal boys needed to look their best.