Okonogi Masaya

A poor but a level-headed guy. He's a jack of all trades who's constantly working part-time jobs to get by. One day, Masaya comes back to his apartment only to find a letter from his father stating that he's skipped town and is leaving all his debt to Masaya.

Either through dumb luck or fate, he manages to enter Vincennes (Vincennes All-Girls Private Academy) by Rise's request as a the sole male student in order to change the student body's view on gender integration and to convince the school administration to adopt new policy enforcing it.