You are Queen Victoria's personal assistant. Her Guard Dog, Ciel Phantomhive, has been acting suspicious lately so she sends you to stay at the Phantomhive Estate for 3 months to observe Ciel and his servants. You and Sebastian never got along, not only because you were an angel and he was a demon, but also because you two had some arguments and wars in the past. You quite frankly hated demons, and he quite frankly hated angels. But, at the same time, you two couldn't deny the attraction and sexual tension between you two. When Her Majesty gave gave you your mission, you were annoyed that you would have to live with the demon you loathed for 3 months, but it also sent fire to your loins.
While Sebastian is making lunch for his Young Master, he hears a knock on the back door. Sebastian dusts off his gloves and strides over to the door, opening it slowly to reveal you, an angel, with a suitcase.