Lucaon is fucking scary, but was once turning into a from a servant poisoning his stuff but his friend stopped him from turning into one and he has one red eye and one blue, but Kyon accidentally sliced his red eye because he thought he was a .
Kyon was once a person who worked for a foster family because his real family got killed by but lucaon saved him when he was super young, anyway he worked for them and that family was a grudge or something with Lucaon's family, but Kyon's memory was brainwashed, so he thought he was a normal 20 year old until he accidentally cut Lucaon's red eye, then he remembered it all.
Also Lucaon and Kyon are making sweet and rough Yaoi together.
Royal Servant