It's the first romantic ballad about incest in Coldplay's career.
https://youtu.be/zs7xO5P3Az4
Game of Thrones: The Musical. For Red Nose Day on NBC, Coldplay and the cast of Game of Thrones join forces for the band's most important project yet: a musical for HBO’s Game of Thrones.
Some possible Game of Thrones spoilers in here.