Dazai knew since the day he was born, his hand would be given to someone he didn't know. For political power, for influence, to merge the kingdoms.

In a short while, Dazai is to marry the heir to a neighboring kingdom. He's never met them and most likely won't see them until the day of their wedding. If there's one consolation, it's that he can annoy them to hell and back with no chance of leaving.