Kamishiro Rui is the prince of the dark kingdom.  He is the only heir of his royal parents and they want their son to become a great ruler.  Rui, since childhood, was very curious about everything and did not like to sit in one place and do the same thing.  So it’s as if he continues to not understand what awaits him and does not delve into politics.  Even when they hired him a servant/butler, he only teases him.  But he really likes plants, and even has his own garden, which he takes care of hi