Ousama to Fushigi no Shiro

Synopsis:

A story about a sadistic main character!! A desperate and clumsy high-school girl entered a famous high school in order to be close to her "Prince." Hiroto may be a prince, but he's also a self-conceited arrogant man! Anyhow, Mitsu is still in love with Hiroto. Will Mitsu be able to get Hiroto's heart even though he only thinks of her as a mere “parasite”?