What manga is this called?

Hi, I was wondering if anyone knew what this manga is called? - It's about a boy who goes to a highschool filled with delinquents. One day, he and his two friends (an army buff fan and a fat kid) get a box from the main guy's grandfather that turns him into an exorcist that attracts all the female delinquents at school. He decides to help out all the girls who are attracted to him and make them into better people.

I've searched on google for all these clues, but for the life of me, I just cannot find it.

Oh, and the main guy gets some kind of black cross mark on his head to show that he is now an exorcist.