From Tokyopop: Before Ekichi Onizuka would become "Great Teacher Onizuka". He and Ryuji Danma were the leaders of the famous 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!

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10 years ago a child wished for the destruction of the world. Now a Group of people has the ability which grants their wishes depending on their power.
They are called "Order User". Before these great people who has the power of "Order", one person excels most, with the ability to rule and conquer the world and turn people into puppets when it is on his Jurisdiction. That power belongs to Hoshimiya Eiji, who is also responsible with the destructive phenomena happened exactly 10 years ago.

From DrMaster:
Yuji Midorikawa is your typical high school student whose has a secret identity: He is "Green" in the high school battalion unit, Gakusei 5 (G5 for short). G5 is the special unit trained to fight and protect Earth against the invasion of the dreaded Galactic force "Gurdark" and its sexy queen Mayura. But Green has a problem. He really can't fight, and always ends up hiding behind his other team mates. What ensues is a witty and wild ride as our "Imperfect Hero" struggles to maintain his reputation as a "guardian of earth" while keeping up his grade point average in school!

This is based on the dating simulation game, Amagami (Gentle Bite). The special focuses on Sae, Ai and Miya, three adolescent girls who are trying to understand their changing bodies and learn how to be "sexy". The chaptered version begins with the story of Tsukasa Ayatsuji, who is the overachieving class representative and planner of the school's Christmas party, and her classmate, Tachibana, who finds himself offering to help her...

One day, Yasuke was working up the courage to confess his feelings for his childhood friend Akari. It was the perfect opportunity, since the two of them were going to eat dinner alone together at his family's shrine. Before dinner, he rushes through the daily shrine rituals and accidentally breaks a sacred mirror.
A goddess, who looks like a cute girl, curses him for it, and now he will die if he's ever separated from her. All too late, he learns that she's a goddess of misfortune, and horrible things happen around her whenever she's upset. Will he be able to get the goddess to lift the curse? And how will he ever explain this to Akari?

Kasukabe Koukou Josou-bu is a part of a series of oneshots of the same name featured in the Josou Shounen comic anthologies. It follows Akira Komukai, a member of his high school's cross-dressing club, along with his childhood friend Minato Kasukabe and a third member, Hikaru Ayase.

Shinya goes to live and take care of with his two younger cousins, Tsubasa Fujisaki and his younger brother Subaru, after their parents go overseas. However, Shinya is surprised to find both cross-dressing upon his arrival.

From DrMaster:

A hilariously hip account of life at an all-girl private high school. As the student body comes of age we witness their search for love, sexual controversy and the rivalry between cliques. Based on the authors own real life experiences this is one manga you don’t want to miss!

Hundred of years have passed since the war between orcs, dwarves, humans and elves.
Now all 4 races live peacefully. This is the story between a sloppy female knight with a mess of a house and an orc that cant stand disorder and unclean stuff.

Kinuko is a member of a ninja family that has an ability to see through people’s clothes! For her, this means she has to see her female classmates’ cute underwear all the time! As embarrassed as she is, she can’t help but stealthily fix her friends’ underwear mishaps!

Youko gets a visit by a girl from the future who needs to have sex with her because she wants her egg cells.

Amano Shiro's "Massaging the Woman I Admire" is about women who works in a salon. A trainee has to massage a senior employee as part of her work evaluation, so she picks the one she has a crush on.

Itsuki Minami needs no introduction – everybody’s heard of the “Babyface” of the Eastside. He’s the toughest kid at Higashi Junior High School, easy on the eyes but dangerously tough when he needs to be. Plus, Itsuki lives with the mysterious and sexy Noyamano sisters. Life is never dull, but it becomes dangerous when Itsuki leads his school to victory over some vindictive Westside punks with gangster connections. Now he stands to lose his school, his friends, and everything he cares about. But in his darkest hour, the Noyamano girls come to Itsuki’s aid. They can teach him a powerful skill that will save their school from the gangsters’ siege and introduce Itsuki to a thrilling and terrifying new world.

Note: Won the 2006 Kodansha Manga Award in the shōnen category. A new edition named Air Gear Unlimited was released in 2014. The format is bigger and it contains some coloured pages.

The Academy City on water, "Rikka". This city, otherwise known as 'Asterisk', was famous for being the world's largest stage for the integrated battle entertainment <Star Wars Festival>. The young boys and girls of the <Starpulse Generation> belonging to the six academies made their wishes with Shining Armaments in their hands, vying for supremacy -- Amagiri Ayato is one of them.

Ayato arrived at Rikka at the invitation of the Student Council President of the Seidoukan Academy, Claudia, and right after that he incurred the wrath of the <Petalblaze Witch> Julis, and ended up having to duel her.

In an effort to gain an apprenticeship with his favorite author, the author imposes a set of various guidelines and conditions for his apprentice to follow which involve cross-dressing and embracing the lifestyle.

Eri Inui is a 20-year-old college student aspiring to become a mangaka. She has been following this dream ever since she was little and has been the best artist among all her friends. But she still hasn't found a publisher willing to take her under her wing.
One day, however, Souta Inusaki, the son of a distant relative, comes to live with Eri and her mother. Souta is an aspiring violinist and has come to Tokyo to practice. Eri sees a lot of herself in the young Souta. But how will she deal with a 13-year-old boy following his dreams and going through puberty?

From Yen Press:

One fateful day, Ryousuke Kaga, a typical hopeless romantic and hopelessly perverted high school student, has a chance encounter in the rain with a beautiful girl. After graciously offering both his home for her to dry off in and his help for anything she might need, the mysterious red-eyed beauty thanks him by stabbing Ryousuke in the chest! To further complicate matters, the girl, Lisara Restole, is actually a shinigami–that is, a god of death–and Ryousuke has somehow unwittingly agreed to let her use his “essence” to remain in this world. But instead of shaving years off his life like one might expect of a typical shinigami, Lisara seems more interested in…leeching the letch right out of him?!

From Manga Box:
Satoru Hasegawa, a young real estate agent, lives together with his equally young wife, Aya, and their daughter. Five years into their marriage, he's not particularly dissatisfied with anything, but he's got a secret that he can't tell a soul! Satoru is helpless before Sayaka, an escort, and Eri, his boss at work, and he's been carrying on lively affairs with both of them. But then he meets a woman with the faint aura of first love... This is a romantic suspense story about a man who can't tear his eyes away from that sweet but dangerous trap.

Shiroko somehow got into an academy for magicians despite being terrible with spells. These are the silly adventures of beautiful, genius magician Kurona being at the receiving end of Shiroko’s (perverted) magic.