All of Haruka’s dancing and choreography have led to this. The Princess League.
During the dance off Live you will need to get the crowd on your side. You can do this by dancing well and using heat actions your learned skills will also affect the outcome of the dance so learning and improving is key.
The battle will have 3 rounds however the outcome is always decided on the third round. It’s possible to win both the first and second round with the third round just giving you bonus points.