Instead of following the plot of the TV series, this movie changes gears a bit and begins a story of its own.

The cast of the anime are all now in New York, working on some sort of musical production. It is like an alternate HYD universe, and is not related to the TV series at all. Tsukushi is a poor girl who works in a theatre building as a cleaning girl. At the theater, the rest of the HYD gang are dancers who are rehearsing for the big show. Tsukushi watches them and practices on her own at night. She dreams of becoming a dancer and is waiting to get her big chance...

Source: niko-niko.net/hana

AniDB | ANN | AnimeNfo | MAL | TVDB

Alternative setting: Hana yori Dango