Name: Yuri Shibuya
AKA: baseball boy, Your Majesty, wimp
Age: 15
Race: half human, half demon
Family: mother - Miko, father - Shoma, older brother - Shori, adopted daughter - Greta
Fiancée: Wolfram
Power: his other side has really powerful magic
Likes: baseball
Hates: war, injustice
Personality: nice, forgiving, and easy going
Yuri was an average high school boy until he tried to help out a guy he barely knows from bullies and got flushed down a toilet. He traveled across dimension inside the toilet and arrived at a strange, new land. He was found by Conrad and Günter. They told him that he is their King because of his black hair, eyes, and clothes. That he has the spirit of their Demon King and they have been waiting for his return. They need his power to help destroy all human enemies of their kingdom. After arriving at the castle, he slapped Wolfram for insulting his human mother. It turned out that was their way of proposing marriage among the nobles. After so many years of never had a girlfriend, he is now engaged to a guy! Yuri then agreed to become the new Demon King, so he can change their ways of solving problems in hope to prevent an all out war between the humans and the demons.
Yuri can also transform into his true Demon King form whenever he feels great anger. In this form, he can summon great magic even in human territories. He always passed out after his transformation and doesn't remember what happened afterward.