In this society, there are two types of soulmates, Melody, and Rythm.
One of the soulmates has a song, this is considered the Melody soulmate.
The other soulmate has a dance, or set of movements, this is the Rythm soulmate.
When they come together, the song and dance fit perfectly.
In the society, soulmate performances are the most famous of performances, as they are the closest things to perfect that you can find.
It has become a tradition in many cultures for the soulmates to perform at their own weddings or similar ceremonies of uniting.

~Sylva
(I just wanted to thank everyone for reading this, it means a lot to me. Also, I've had this idea for a while, but I was thinking of making a complimentary one shot book and writing some if the aus, would anyone want that?)