Interesting for the Fanastasias among us to see this. The new song is performed about 45 seconds into the video; there are also performances of 'The Neva Flows' and 'Journey To The Past'.
I can't understand the lyrics with my mediocre schoolkid Japanese, but some of the music echoes a section of 'Meant To Be'. Based on that, and the song's title, I'm guessing that it's sung during, or close to, the ballet foyer scene? According to https://kageki.hankyu.co.jp/english/revue/2020/anastasia/index_takarazuka.html, the original creative team, Stephen Flaherty and Lynn Ahrens, wrote the song. I believe this is done from time to time for Takarazuka productions.
At this point...I would love to see ANY live production. I had tickets to the cancelled tour this year. I prepurchased the cast cd as a "souvenir" for the show as I do every show I attend. Yet....no show. Hoping down the road, a tour will be announced. Maybe 2021 or 2022?