Mx0 Manga...

A must read manga in my opinion.
But the ending was a disappointment, you'll find out when you read it.
Also this manga is about 99 chapters.

Summary-provided by [url=onemanga.com]OneManga.com[/url]

The story starts off with a flashback, Kuzumi Taiga is asked at his school entrance interview what he would do if he could use magic. "Take over the world" is his reply, followed by an outburst of laughter from a very cute girl. Not much remains in his memory after those events, but he does remember the girl and she is somehow involved in him failing to enter the school of his choice. Wandering around outside of aforementioned school the next day, he gets mistaken for a student ditching class by one of the teachers, and get's pulled into the school through a magic barrier he did not notice. He is in fact a student with no magical ability at all, and it just so happens this is a magic school.

-If you're interested, you can read it here for free.