Can anyone help me find this bl short story? It's about the mc being the fiance of the emperor something or a guest but his motive was to kill the emperor? He did it while during dancing but was unsuccessful also the ml is a knight and a friend of the emperor? I think the emperor was a girl and the emperor has a white haired guy partner? And also at the end of the story it's like the knight betrayed the kingdom to save mc then they flee?
I can't remember the title and I really want to reread it, please help me find it