is a shōjo manga series by Riko Miyagi. It was serialized in Japan by the publishing company Shueisha in the Margaret from 2002 to 2006 and collected in 12 Tankōbon volumes.
Story
Hiyo Osora failed the entrance exam to the high school she chose, but somehow she receives a strange acceptance letter to SM Academy (Saint Monster Academy) -- which she hadn't even applied to. Thinking that her father, an alumnus of the school, must have sent in a reference letter for her, she decides to go to the school. When she first arrives there, while being distracted by the flowers and green nature around her, two hooded people (Yuki and Jiro) snatch her and bring her to the school president, Kurou Tenma. Fortunately, all that was simply a type of hazing for all new members of the school.
She is surprised to find the school crawling with people who are actually monsters in disguise! The next big shock is being told by Kurou himself that she is his fiancée! She is so shocked she faints. She then wakes up and finds out that Kurou has gone as far as having her room connected to his. The only way she can get out is in his arms with his wings or as we discover later on, a trap door down an enormous amount of stairs (since his room is located in a tower).
Characters
Main characters
Hiyoko Osora
Hiyo Osora is 15 years old and attends SM Academy (Saint Monster Academy). Her genre/type of monster is crow, specifically, a white crow which was considered to be a legend. Despite being a white crow monster, she is actually quite useless, often needing someone else to save her in times of trouble. She is actually only half monster from her father, Shou Hiyo, and half human from her mother, Kyoko Hiyo. Her parents are divorced because of her father's doll face high school appearance, which he can't help, since he's a monster. Hiyo's life is in constant danger because there are dangerous people that are out to get her white feathers. It is said that whoever gets a white crow feather will be granted any wish they desire. The person that usually ends up saving her is Kurou. She secretly harbors feelings for him, but will repeatedly deny that she is his fiancé. Kurou asked Hiyo if he could just call her Hiyo, and she said yes. Later on in the story Hiyo no longer denies her feelings. She adores food, video games, and everything cute. Ironically, she has a fear of heights; she developed the fear because she didn't know she had wings until she went to SM Academy. When Hiyo was still young, a powerful witch erased all her childhood memories, and that is why she doesn't know how to fly until she attends SM Academy. Hiyo also forgot that she was the one who proposed to Kurou although she doesn't remember it due to the witch erasing her memory. Hiyo has many people who adore her and love her, but the only person she truly loves is Kurou.