It's cute that you confessed you're nervous ahead of your performance on the last day of KCON.

He said he had a very hectic week after coming to the U.S.

They say they feel a slight sense of relief since it is the last day. You can imagine how busy they must have been working.

He said he wanted to make a good impression and get a good night's sleep on the flight, so it's likely because he crammed all his schedules into one go while he was out, leading to sleep deprivation.