I was always sort of struck by the odd weirdness of picking up your newest assassination targets via pigeon. I feel there is a lot of possibility for a mixup or miscommunication. Anyways, I would love to see one of the assassins getting a message from their higher ups telling them that their next target is their lover (make it slash). They dwell on it, wonder if it's a lie, panic, etc. They convince themselves to go and do the deed but not without one last night together with the target. You am decide if they actually kill the person, if the target actually was a traitor or if everything was just a huge misunderstanding. Anyways, SERIOUS SHOT GOES DOWN.
Unlikely target
Any pairing really.