Mx0 is about a boy named Taiga Kuzumi. He fails his entrance exam to get into a prestegious school called Seinagi Private High School. He believes he failed the exam because when he replied to the question "If you could use magic, what would you use it for" with "Take over the world", a girl in the room with him burst into laughter.
He attempts to get onto the school campus to find the girl. Hes mistaken by a teacher as one of the students, and thats when the funy, slightly crazy, situations start happening.
It turns out Seinagi Private High School is a school for magic, and now Kuzumi must blend in without knowing magic.
Mx0 is one of my favourite mangas.. Everything was perfect till the end. The only problem was that it was too rushed... It's said that the author had to wrap it up, and it was rather abrupt. I would have liked to read more, but oh well... :P It's good. REALLY. I've read it twice ^^