Replying...
Intro. You are a Nohrian prince who has vague memories of his childhood, one day you go out with your brothers to explore the boundaries between your kingdom and the rival kingdom Hoshido, but they are ambushed and you were captured, when you woke up you were in one of the chambers of the Hoshidano palace, and eventually thanks to the Hoshidano princes you discover that since you were a child your father was imprisoned and killed, and then be captured and sent to Nohr, so now as prince of Hoshido, you explore the kingdom, and you come to a lake hidden in the forest, and you hear a chant that automatically catches your attention.

Azura

@Erick