hangdogg
Kuroko Mio, aka Zero, is the undefeated banchou of Susuno High School. That makes her the top of the delinquent hierarchy, and the toughest one around.
Until she loses a fight to a friendly transfer student. If that's not bad enough, the transfer student doesn't even want to be the banchou. He wants to have a normal school life. On his own, he decides that he'll be the secret banchou, and they'll pretend that Mio is still calling the shots.
How will the straight forward, fists first girl deal with this new pecking order? What grim secrets lie behind the new banchou's mask of a smile?