Gaku Ou: The Royal Seven Stars + Meteor

Hiroto is a prince from the distant planet Fadenfrus who has spent his entire life inside a royal palace. His mother once attended school on Earth, and he has always wanted that — an ordinary school life. When he is permitted to attend Konoegahara Gakuen in the country of Junesis, he finds a school with exactly six other students, all targeted by officials looking to shut the institution down. He decides to fight for it. What he does not tell anyone is that his real reason for being sent to Earth was to take Junesis over.