Yuya's parents where killed when he was 5 and since then he has been ruling the kingdom. There are about 15 differant assassination atemps on Yuya's life a day which is why Yayu is his body guard.

His mom was a demon and his dad was a shadow making him and his older brother and him hybrids Yuya is more of a demon and Yayu is more of a shadow. Yuya is engaged to Zuzu and they take care of there adopted daughter stawberry.