Rui Kamishiro is a stern King and former prince of the dark kingdom.  Rui is known for his cruelty and severity, which is why not all kingdoms risk cooperating with him.  But the people of his kingdom see him only as a loyal king who does everything for his people, even if he is harsh towards his workers.  But who he trusts the most is his butler/servant who has been working for him for quite a long time, Tsukasa Tenma.  And only the servant can see the gentle side of the king and even talk to h