Shiozaki Yuji manga
It's the 18th century in Naples, Italy. There is a girl named Maria living peacefully in the city, but she is more than she appears. She is like a goddess of death, with a sword that cuts through everything. But what exactly is she? Where has she come from and what cruel destiny awaits her?
From Tokyopop: Sealed in ancient jewels are the spirits of the heroes who tried and failed to unite China in the Three Kingdoms era. These jewels have been scattered throughout Japan, and have the power to draw out the full potential of those who inherit them. However, those owners, known as Toushi, are possessed with an insatiable appetite for battle. Hakufu Sonsaku is one such Toushi. Living in the country, Hakufu's desire to beat something to a pulp goes unfulfilled until her mother tells her to go to Tokyo, where she starts training with other Toushi and sets foot on the path to her destiny.
From Tokyopop: When freshman transfer Mokichi arrives at Swan Academy High, he's got a chance to start over with a clean slate. He's got a plan, too. Kick the butts of the toughest guys in school, prove himself to be the baddest dude around, and run the whole shebang. Problem is, it's his butt that gets kicked that first day. Completely humiliated, Mokichi joins the Wrestling Club in hopes of learning to fight. There he meets unlikely allies, Tamako and Higuchi, two of the hottest battle babes to ever roll their sweaty bods over Swan Academy's gym mats. And Mokichi's gonna need all the friends he can get, what with the likes of the Karate Club looking to "break in" the new kid in the worst way possible.