Jungkook has never regretted anything in his life more than this moment when he realized he never asked Jimin for his number. He is even more disappointed when he realizes that Jimin isn't on his flight back to Korea.
Two days back in Korea and Jungkook can't take the separation. He immediately contacts the airlines to enquire about Jimin. They let him know its private information that can't be revealed and the next thing they know, Jungkook is in front of their office with expensive gifts and a promise of good word of mouth in exchange for a little information to finding the love of his life and they comply