Marginal Prince: Gekkeiju no Ouji-tachi
Genres: Boys Love, Romance
Type: TV, Episodes: 13
Aired: Oct 2, 2006 to Dec 25, 2006
Studio: Tokyo Kids
Source: Visual novel
Rating: PG-13 - Teens 13 or older
Synopsis:
"Marginal Prince" based off of the hit love simulation game series for girls! Yuta studies abroad in a tiny, far away island in the pacific ocean name Alphonso where he enters the all-dorm, all-male Alphonso Gakuen. However, the school is really a place for the children of the famous . . . and the school specializes in classes on empires and alchemy! And one day, after studying enough at the school, the students become known as "Marginal Princes"! Learn about the stories of fate and trial as each of the students studies to become kings!

(Source: Crunchyroll)