Hayate The Combat Butler manga

Tenchi Masaki is a shy high school boy, yet honest and hard working. He looks forward to living a basic humble life, taking over his grandfather's shrine. However, nothing is ever as simple as one would want, as Tenchi soon learns. A series of events begi

Maeda Hachibei is unlike most guys, who lust after gorgeous girls. This pervert lusts after their discrete parts, instead. When he moves to Tokyo to attend school, he finds himself living in a dormitory with five girls, each of which possesses one of the

Kou Shiraishi was your standard high school boy with lots of problems, mostly bullies, until the day that he meets Mikuru Nazume during a bank heist. Not only is Mikuru the school idol, but she's also an agent for Minkei, a covert paramilitary section of the National Police Agency. They team up as Kou and Mikuru journey to become stronger, both in their own way.
(Taken from mangaupdates.com)

The young ninja Kagetora has been given a great honor—to serve a renowned family of skilled martial artists. But on arrival, he is handed a challenging assignment: teach the heir to the dynasty, the charming but clumsy Yuki, the deft moves of self-defense and combat.

And yet, Yuki`s inability to master the martial arts is not what makes this job so difficult for Kagetora. No, it is Yuki herself. Someday she will inherit her family dojo, and for a ninja like Kagetora, to fall in love with his master is a betrayal of his duty, the ultimate dishonor, and strictly forbidden. Can Kagetora help Yuki overcome her ungainly nature . . . or will he be overcome by his growing feelings? (Source: Del Rey)

Plot: A alternate version of Mahou Sensei Negima! that preserves the characters and setting but changes the story around.

From Tokyopop:
Before Ekichi Onizuka would become the "Greatest Teacher in the World," he and Ryuji Danma were members of the infamous biker gang, Oni Baku. When they weren't out riding around and getting into trouble, this duo could be found in school. Doing what you ask? Picking up young women of course! 

Plot: Sayama Junichirou is an ordinary student who wish for some action in his life. Then when he come home one day, he became hostage of a fameous bank robber, Kazuha.

From Tokyopop:
On a world with no women, the surviving men have reintroduced the female in the form of an android. Called Marionettes, they are built to serve men and are limited in their interactions with humans. That is until a poor boy named Otaru Mam

The trouble and fun began when ordinary teenager Tenchi Masaki inadvertently released the legendary demon Ryoko from his grandfather's shrine. Turned out Ryoko was actually a marooned space pirate! Since then, she's become Tenchi's unwanted houseguest, attracting a host of other troublemaking alien women: Ayeka, a haughty alien pricess; Sasami, her mischievous little sister; and Washu, Ryoko's mad-scientist "mother." Add Ryo-oh-Ki, an adorable little carrot-eating spaceship, and you've got one full Shinto shrine!

Plot: Tenchi Masaki is a shy high school boy, yet honest and hard working. He looks forward to living a basic humble life, taking over his grandfather's shrine. However, nothing is ever as simple as one would want, as Tenchi soon learns. A series of events beginning with the sudden appearance of Ryoko, the space pirate, creates madness in his home. Now he must figure out how to juggle 2 princess's, a space pirate, 2 galaxy police, the worlds most intelligent genius and a Rabbit-turned-Spaceship in his quiet country home.