Rose Hip Rose is a manga about a teenage girl who fights crime. While the setup doesn't sound so great, it gets better as the manga progresses. The series' major strong point is the art. Along the way, she ends up having a showdown with a major criminal named The Goat. However, it seems that The Goat doesn't seem to like being caught. Be wary, though, the series is very violent.
The art and story are by Fujisawa Tohru, author of GTO and Bad Company. The art is quite nice, but somewhat different from GTO's. If you like violence, gore, Fujisawa, or cacti, Rose Hip Rose is the manga for you. Oh yeah, did I mention it was violent?
Reprint contains as volumes 3-4