From Tokyopop:

Gun has always been a problem kid, but after a tearful plea from his mom, he decides to turn over a new leaf. Vowing to abandon fighting and troublemaking, Gun transfers to a new high school, attempts to be a good student, and rents a room at the local coed dorm. There he falls for Seung-Ah, the dorm owner's granddaughter.
However love is not to be for this couple, as sexy Ji-Ae's untimely advances always thwart his attempts to woo the innocent Seung-Ah.

From Alice Dreams:

Misaki Sakurako is a thirteen-year-old girl who loves ice cream and cherry blossoms. Living alone, she had a weird dream that told her she is the only savior to three young child boys... Strangely enough, she woke up to three handsome strangers who asked her to resolve their dear curse--their bodies will transform if they see any slightly "perverted" materials (posters, pictures, etc.). The only way to prevent them from transforming would be...?

Takuma Miyabe is a boy from an island who moved to Tokyo because his island doesn't have a high school there. However, the ratio of male and female is 1:9. There are too many female students in his class, and as a result, they "flirt" and torture the still innocent Takuma.

When she suddenly wakes up, the heroine, Fuka, who was in a completely unknown land, has no memory of anything. All of a sudden, an unknown silver-haired man suddenly points his sword at her as the whole town runs about in confusion trying to escape. I’m going to be killed — at the moment she resigned to that thought, the one who extends a hand out to rescue her is …?

From Shoujo Crusade:

In the world of the high society , it is expected that each member of every family has their own personal butler. Himeoka Kokoro is a natural tomboy with a knack for sticking her head into trouble. Kokoro hopes to be able to hire a butler for herself, but only temporarily so she can partake in the nationwide "Miss Princess" model search. She is determined to win the competition because of a promise she made but runs into problems on the way. She incidentally saves an old lady who turns out to be the President of Butler, the most prestigious butler agency in Japan. The old lady decided to help her with the model search & Kokoro is suddenly faced with four good looking butlers to help her on the way to winning the title "Miss Princess".

Ookuni Kenichi is the successor of the Inaba Shine. After 10 years away, Kenichi returns to the shine to follow in his grandfather's footsteps. After misunderstandings and mishaps, Kenichi discovers the four shrine maiden's secret and wonders which one is his childhood friend that he made a promise to.

Nareh and Tareh are fraternal twins, Nareh the elder sister and Tareh the younger brother. When Nareh learns that Tareh has been accepted into the all-boys Ordinary School, she is shocked, and prepared to stop him at all costs...

Kanon's story, set in the middle of winter, regards a group of five girls who are connected back to the same boy. Yuichi Aizawa, the main protagonist, had visited the city where the story takes place seven years prior to the story's beginning.

In the beginning Yuichi is very detached from the city and its inhabitants. Prior to his return, it is decided that he is to stay with his cousin, Nayuki Minase, and her mother, Akiko. After his long absence, Yuichi has forgotten almost everything except minor details of what happened seven years before and is in need of being reminded of what he left behind.

On the day after Yuichi's return, he is out with Nayuki who is showing him around town. Nayuki remembers that she has to buy things for dinner and Yuichi is reluctant to go with her, arguing that he might get lost. Moments after Nayuki left him waiting on the sidewalk, a strange girl named Ayu Tsukimiya barges into him with little warning. Upon recovering, she drags him away to a nearby café and confesses to inadvertently stealing a bag filled with taiyaki after being accidentally scared away by the salesman before she had a chance to pay. Yuichi then drags Ayu back to the salesman, they both apologize for the trouble, and Ayu is forgiven. They decide to meet up again another day and Ayu scampers off.

Yuichi is not aware at first, but three other girls which he had forgotten are familiar with him. Throughout the story, as he learns about the supernatural undertones of the town, Yuichi is reminded of each girl and the events of seven years ago in the city covered in snow.

A laid-back 4-koma manga about a feminine baseball coach and the wacky girl's team he manages as they aim to win the Nationals... maybe.

From MangaHelpers:
A sequel to Kenzen Robo Daimidaler, this once again features the high schooler Koichi Madanbashi. Koichi possesses "Hi-Ero" particles, which are powered up by groping women, and he is particularly fond of groping women's breasts. He pilots a robot to fight the Penguin Empire's killer penguin robots.

There are demons who prey on beautiful young women and possess them. Fortunately, there is a magic user roaming the city who can banish them, but he needs to make physical contact with the women in question to banish the monster. Specifically, with their breasts. This is the story of this traveler and his witch companion.

Besides the fact that both of his parents are on an extended business trip overseas, Mizutani Masayuki was just your normal high school student. One day, Shimizu Sayaka, a girl who's in the same grade as he is, barges unexpectedly into his home and his life announcing, “Your parents hired me to be your maid!” From that day forward, Masayuki finds himself having to deal with Sayaka, the self-declared “live-in maid, er wife,” Takamura Yuka, his aunt who is actually younger than him and fondly calls him “Onii-chan,” the yandere girl Takagi Mai who is in love with Yuka, and his kouhai Ozono Anna whose imagination about Masayuki and Sayaka’s relationship always runs wild. Thus, his days of being caught up in those girls crazy ideas (usually unprintable) begins.

Yuta, a ronin student, moves to Tokyo with hopes to enter university. With no money, he moves into a share house filled with beautiful women.

Kodai lost his younger sister in "Noah's Flood", a catastrophic event that submerged Tokyo not too long ago. He confines himself to what's left of his old life, refusing to move on. One day, a mysterious girl who calls herself "Kururi" jumps out from the endless sea, claiming that Kodai's "home" actually belongs to her. After a brief chase from some mafia-type group, Kururi forces herself into Kodai's life as his new roommate. Because of this, Kodai is forced to start moving on from his tragic loss and both of them have to learn to adjust to the new way of life that "Noah's Day" forced everybody to live.

Little Busters! revolves around Riki Naoe, a young male high school student. When Riki was a child, his parents died, leaving him hopeless and depressed. What saved him was a group of his friends who referred to themselves as the Little Busters; they took Riki out and played together with him during his time of need. He really enjoyed playing with them, and his grief gradually faded away. When the story begins, they are in their second year of the high school they attend. They still hang out together, and enjoy their school life.

From MangaHelpers:

No one can make the perfect decision every time. Everyone has those moments that they wish they could redo and alter their decision. This story revolves around girls that got their second chance. [DrCoke]

Sayama Junichirou is an ordinary student who wishes for some action in his life. When he come home one day, he is held hostage by the famous bank robber, Kazuha.

Kaoru is a 17-year-old virgin who has an SM fetish. He secretly dreams about an SM relationship with his childhood friend Nana. One day Kaoru's mom asks Nana to hide all his SM toys so he'll study for a change. However, Nana finds the leather one-piece that Kaoru bought and tries it on, but she accidentally locks it and doesn't have the key! The beginning of their super strange relationship.

When Hideto, a high-school student who is afraid of women, is suddenly targeted by a beautiful older woman whom he believes to be a molester, he runs for his life. Mid-pursuit, he is attacked by what he previously believed to be an illusion, a blur that nobody else could see.

Boys who can't love and girls who don't want to. What will happen when two people who are like this meet? If two people like this do find love, how will the world change?

This manga is based on a adult erogame. The main male character is Asaba Yuma, and the story follows the school life he shares with many girls and his one male friend. These girls include Tsukishima Yuri and her twin sister Hanako, who is in the newspaper club, Yuma's little sister Konami, who likes shogi, and several others. Will Yuma find love in his teenage years? [tethysdust]