The new butler, Mr. Kazuki, was actually no other than the old man who ordered to kidnap Davi the other day. He was Sei's grandfather, Mikazuki Youjirou. He was the father of Sei's late mother, Mikazuki Fei, and was the last king of country J.
Fourteen years ago, with the real reasons not being disclosed, King Youjirou managed to convince the monarchic loyalists to abolish his own country's monarchy and turn it into a republic.
Rumor was that, the real reason behind the abrupt decision was because of the disappearance of the king's only heir and only grandson, who never once appeared in public eye. Mysteriously, no official announcement was ever made about the rumored prince either, thus creating a tremendous pile of never-ending gossip and theories about his real existence, even to this day. The answers to the ongoing questions about the monarchy abolition and the rumored prince were buried way too deep, that to many, it might never be uncovered in this lifetime or the next.
