what she means: In a Crowd of Thousands reveals that Dmitry is set on the girl he saw when he was 10 years old, and when Anya remembers it being her, his first instict is to sing in rejoice because he found her again, and afterward leans in to kiss her. Anya isn’t opposed to it at all, but he stops because in that moment he has to realize that she’s not just the girl he’s been in love with all this time, she’s royalty. Dmitry literally finds his dream girl and then immediately after has to face the fact that she’s out of reach. His kneel is out of respect for her position, but it’s also the point where he is forced to accept that his dream was shattered as soon as it came true.
Donghyun, you’ve worked hard! I hope you’ll take now time to rest, play your guitar and compose new songs. We’ll be here waiting for your debut with the other Brand New Music boys and your concert full of your self-composed songs. See you soon