Hiyo Osora is 15 years old and attends SM Academy. She is actually a half monster from her father, Shou Osora, and half human from her mother, Kyoko Osora. Her parents are divorced because of her father's doll face high school appearance which he can't help since he's a monster. She adores food, video games, and everything cute. She has a fear of heights. When Hiyo was young, a powerful witch erased all her childhood memories. Hiyo has many people who adore her and love her, but the only person she truly loves is Kurou.