Nitta Arata is a typical 21 year-old junior attending college of science and engineering at Toaru University. He is bright, he's in the engineering program after all, but he definitely is from a working class background. He has been working his way through college for the past 3 years without major incident, so being swept up in a warped experiment of an equally warped professor was the last thing he expected in the second half of his college days.

One day, Arata received a letter asking him to meet someone whose initials were "N.H." at a relatively secluded location on campus. The letter looked suspiciously like a "love letter", but Arata had his doubts. More likely it was a cruel practical joke perpetrated by one of his buddies, especially when the initials matched those belonging to "Nogi Hatsune", also know as "Miss Engineer", the reigning heartthrob of the engineering department. Why would somebody like her be interested in a nobody like himself? The short answer was that she would not be interested, but why take the chance of missing out? So there was Arata, in ultra-cynical mode, waiting at the appointed location when he was suddenly grabbed from behind! His last thoughts as world turned to black was that the gloved hands covering his mouth and nose reeked of ether...

From ShoujoMagic:
Merumo has come to the human world from the Magic Village, and is an extremely pure hearted witch by nature. Her mission is to find a "Bii Men" ("Bee-autiful Face") gentleman... and make a baby with him?! Flying through the air on spinning wings, Merumo searches a school in the center of Megalopolis and causes an uproar. Amongst the gathered crowd, however, are four Bii Men! And so begins Merumo's life as a student...!!

Yamada has one goal when she enters high school.: She wants to sleep with 100 guys. But she's got one small problem: She's a virgin. Afraid of being rejected or ridiculed by hot or experienced guys, she decides that in order for her to reach her goal, she first has to do "it" with another virgin. While in a bookstore, she bumps into an average-looking boy (named Kosuda), and decides he's the perfect candidate. Will Yamada succeed in getting Kosuda to bed, or will something more bloom from the not-so-innocent start to their relationship?

Yousuke and his sister were orphaned at a young age. Yousuke's sister was adopted ten years before the start of the story, since then, he has been looking for her.

One day Yousuke found the couple that adopted his sister, the problem is that they have two daughters, Ayu and Mayu, both of which were adopted from the same orphanage and are roughly the same age. Both Ayu and Mayu had an older brother before being adopted.

Things get more complicated when Yousuke learns that the orphanage where he previously lived was burned down a year earlier, destroying all the records, and that the couple's own records have disappeared. Yousuke must figure out which one of the girls is in fact his sister.

From Nevermore Scans: Ayahatori-that is the given name of the family possessing a mysterious power. They have the power to be able to summon and use beings and people from secret ancient writings. During the Ayahatori initiation ceremony, high schooler Kozakura Saaya summons one of the three most beautiful women in the world, Ono no Komachi. However, what appears in front of her is a man with matchless beauty-!?

From Fate:

Father's restaurant is now in danger. To save our crisis, a young chef, Habuka, suddenly appeared in front of my eyes. He's a very rude bastard, when we met for the first time everything went wrong. And I don't know why he lives in my house! But now, I have to live with a red face and my heart beating fast around him.

Emiri, a 23-year-old high school teacher, makes love once with 18-year-old Shishioh (meaning Lion King) and they decide to get married. Shishioh transfers to the school where Emiri teaches.

From Keijo Shoujo Scans: Haruko Nanase wasn't always the brightest student, but through sheer hard work she successfully entered a prestigious high school and is at the top of her class. While riding the train one day, she witnesses a fight involving a guy wearing the same uniform as her. When the fight is over, he demands that she pay him a fee for watching it but she escapes. The escape is not to last though, because the next day the guy turns out to be in the same class, and worse, his seat is next to hers.

Yoichi Karasuma has spent all of his life in the mountains, training in the Soaring Wind, Divine Wind swordsmanship style. Under his father's guidance, he is able to master the technique at the age of 17. With nothing left to learn, Yoichi is sent to a new dojo located in the city so he can continue to train and gain an understanding of modern society.

Unfortunately, Yoichi has no idea how to act or speak to anyone in the present day and acts like a samurai, complete with odd speech and traditional clothing. As he goes to live with the Ikaruga sisters Ayame, Kagome, and Chihaya, at the dojo, Yoichi, clueless on how to interact with others, is constantly hurtled in hilarious misunderstandings.

1) Ren'ai Han'i 1%
Kagami and Fukamachi are two friends who both secretly love each other, but the other doesn't know it. Then one day, Kagami tells Fukamachi that he's interested in his sister Lisa, upon which Fukamachi then reluctantly decides to take Kagami home to see Lisa. Now Kagami is faced with showing Fukamachi how he feels before he's forced to go out with a girl he doesn't love...

2) Asobi ja Nai no
Continuation of Kagami and Fukumachi's new relationship.

3) Urahara na Koi
Kyouya, a socially awkward college student has trouble smiling and gets bullied at school. What happens when he stumbles into Akira (a high school student) when he's out drinking?

4) S ni Ochita Seinen
Kyouya (not from chapter 3) is in love with Shirou, his business partner, but Shirou already has a lover?!

5) Don't Worry About It!
Ryuusei has for a long time been in love with the carefree and friendly Nagisa, who on the other hand is oblivious of Ryuusei's feelings for him. The day comes when Ryuusei has had enough and confesses to Nagisa by giving him two options, to become his lover or stop all contact with him. Now, what will Nagisa do?

6) Amai Koto Shitai
Although Otonashi's first impression of Tonozaki-senpai was "horrible" when they first met as members of the students' council, their relationship soon alters through time after their involvement with each other.
(Story setting is the students' council from Warui Koto Shitai)

7) Asobi ja Sumanai no
(Ren'ai Han'i 1% and Asobi ja Nai no omake)

Poor student Ikumi Amanume through a series of strange happenings, finally found a great way to supplement his income by becoming the housekeeper for his next-door neighbor, Yuuji Touno, a notable scenario writer.

Life seems pretty good except for the little problem that Touno tends to get too involved in his work and actually lives out the different characters that he creates! So Ikumi's head is kept spinning by the parade of extreme personalities that he encounters, especially when he starts falling in love with the real Touno, who never seems to hang around long enough...

Yuu is a plain, boring, college girl from the countryside who is often made fun of for her outdated looks. One day Yuu happens to be invited to see a play. She discovers a passion for the stage she didn't know she had, and is determined to become a part of it. This is her drama.

After a bad break-up, Kusakate leaves his ex with nothing but the clothes on his back. Sitting around in the park with nothing to do and nowhere to go, while contemplating his bad luck he is discovered by Hanamura, a former student of his. Their meetings soon become habitual....

From Mixini Studios:

Kyouichi Miyasako is the star employee at his company. Why does he work so hard? He doesn’t know either. What he does know is that he sorely misses his girlfriend… the one he broke up with in college because he couldn’t put up with her hobbies any further.

One day, an ominous black sphere mysteriously appears in the skies and shoots a laser beam in his direction. He doesn’t get hit, of course, but when the smoke clears, guess who he sees?

1-5) Darling Long Legs
Ah, where there are innocent and cute young men there will always be older rich men who love them secretly from the shadows and support them anonymously. This one is a bit funnier than most with the D.L.L. having a neurotic side.

6) A Day in the Life of Mr. Azuma.
The story takes place 10 years later as Mr. Azuma describes his life with Prince Luke to Yuuya.

From vyc at MangaHelpers:

In the Ben-to series:

V.1 - Ben-to Zero: Road to Witch
Bargain hunters seek the best deals and compete against each other to obtain the product on sale. Yarizui Sen, who just moved into town and started living on her own, is introduced into the cutthroat world of bento bargain sales.

Near closing time, supermarkets put unsold bentos, prepackaged meals, on sale and hungry competitors who call themselves wolves fight against each other to see who gets the right to purchase the delicious and cheap meal. Sen learns under the most feared competitor of the town and trains to use her hunger as a source of obtaining the half off bentos.

V.2 - Ben-to Another: Ripper's Night

V.3 - Ben-to: À la carte

From Blissful Sin:

During the last summer holiday of high school, Chinatsu, who has been scared of sex ever since he had his heart broken, decides to jump into the arms of Charles Yamazaki, who is said to be a Love Counsellor that can bring one out of one's pain no matter how terribly one's heart has been broken.

For the first 14 years of his life, Yukio Tanaka has been one heck of a boring guy. He has no hobbies, weak taste in music, and only a small vestige of a personality. He yearns for an exciting life, but his shy, and somewhat neurotic personality makes him his own worst enemy. Little does he know that his life will be forever changed when he meets Ryusuke Minami, a wild and unpredictable 16-year old fresh from America, who happens to be in a rock-and-roll band named after his Frankenstein-like patched dog--Beck.

Note: Won the 26th Kodansha Manga Award for Best Shounen in 2002 (shared with Sakigake!! Cromartie Koukou).

From Viz:

Although a truly gifted hairstylist, Kiri Koshiba has no interest in using her talent to pursue fame and fortune, unlike the three popular boys in the "Scissors Project" at school. Determined to become the best makeover team in Japan, they give showy makeovers to handpicked girls. As much as Kiri tries to shy away from the Scissors Project spotlight, she finds herself responding to beauty's call...

Note: Beauty Pop Stage 2 is from volume 7 to 10. It is a continuation of Beauty Pop. This is because they were published after the hiatus. The whole series ends with 10 volumes.

When bubbly eleventh-grader Eimi Yamashita finds out that her parents are relocating for work, she decides to strike out on her own and move into a dormitory for girls. Little does Eimi suspect the exciting romantic adventures that await her there! Eimi's fellow residents are a little bit crazy but a whole lot of fun. They've got a secret mission planned for Eimi's new resident initiation...and it has something to do with sneaking into the boys' dormitory across the street and returning with a special keepsake! Can Eimi pull it off without getting caught by one of the handsomest (and cruelest) boys in the dorm?