Konoyo Ibun
guy has an incurable disease. a curse through his entire bloodline. summons a demon as he is dying by accident. one who is sworn to protect him and his family through all time. he eats the sickness. and has sex with him too. barely even interesting. (vol.4-7 unrelated)
Royal Servant
not a fan of the start of their relationship, but i did come to like it a lot later. Got the two childhood friends, who both have servants as lovers. They have special powers as well as are royals, and hunters. They have the friend, who is the "dad" figure, who is hundreds of years old, and saved almost everyones life at some point in the story. we have the uke servant, who had his memories wiped and was sold into the enemy's hands as a child. the one creating "Zeros" (Fallen crazed royals). He loved his master. he saved him as a child. he and his buddy rescued him as hunters, from when the whole house got slaughtered. he promised to come find him again. but his master lost his family in a poisoning incident shortly after. and almost fell to a Zero until there "dad" friend stopped it and saved him.
Golden Eyes