Ciel is not the only surviving Phantomhive and he is not the eldest either. His older brother, Vladimir Phantomhive, Lord of the Phantomhives, eldest son of the late Lord Vincent and the late Lady Rachel Phantomhive, is the one who makes a deal with a demon, who he let Ciel name Sebastian Michaelis. Yet even though both brothers struck similar contracts with the same demon, the son of Satan only has his sight set on the eldest brother, not only because of the Faustian contract but because the eldest Phantomhive brother is his mate and he will protect both brothers, no matter what it takes.

(Black Butler x Male Reader) Desperate times call upon demons, but when the fiancee of Ciel Phantomhive cannot bring herself to be happy anymore, a special demon comes to her aid. A yokai. Originating in Japan, they only cross the sea to other countries if they find someone worthy of their time. It just so happens Elizabeth might just be worthy of being served by the Kitsune Yokai. All she has to do, is give him an offering he will like.

Sequel of Black Butler x Male!Demon!Reader, hope you guys enjoy

When the head butler of the Kirkland estate and the head of the estate, the queens Panther will meet the queens guard dog.

(Seme! Modern!Male reader X various) You and your little sister lived together in a clinic near the woods.... Treating all kinds of injured creatures.... and i mean ALL OF THEM!... From dragons to fairies.... You two were caretakers of that forest..... but a accident sends you both to the Black Butler universe....