From Central Park Media:
In reality, an ugly duckling could never become a beautiful swan. However, when a short ugly boy makes a wish to be reborn beautiful, his wish is granted and he becomes a gorgeous young man that all the girls fall for. Will being beautiful be everything that he hoped it would be?

High schoolers Yuki and Shigeru aren't dating, but still enjoy a highly active sexual relationship. Naïve and still very child-like in the way they think, it comes as a great shock to them when Shigeru discovers she's pregnant. The two are confronted with the decision of aborting the baby and wounding Shigeru, or to keep it and face great opposition from their parents and high school, and *gasp* miss their beloved Conflict concerts!

A short extra story about Akinobu and how he reacts to the incident which happened in Kodomo no Iibun Mainichi Seiten series: Vol 1-2 Mainichi Seiten Vol 3-4 Kodomo wa Tomaranai Vol 5 Children's Time Vol 6-7 Kodomo no Iibun ----Aki-chan no Iibun Vol 8 Isoganaide Vol 9-10 Hanaya no Nikai de

A collection of oneshots (some are two chapters):

1-2) The Door to the Closed Mind
Back in college Usui ignored Masuoka, the cute kouhai who had the not-so-secret crush on him, but now he's hired him as his assistant. Dealing with the shy Masouka isn't too hard, however the pheromones he emits have the perverts crawling out of the woodwork! Is Usui immune, or just biding his time?

3) The Ugly Duckling and the Prince
In high school reserved Tayama paled in comparison to princely Tachibana, even the girl Tayama liked did nothing but talk about him. Now that they're in the same college Tachibana has latched onto Tayama as his new best friend. Fighting off the Prince's fan girls is proving to be troublesome, but more worrying are Tayama's own feelings...

4) The Prince's Sweetheart
Tachibana and Tayama's story picks up viewed from Tachibana's rather unique perspective.

5) It's Lonely When You're Cold
Muraoka Takeo has been admiring the beautiful but reserved store clerk for months, but when Takeo finally gets up the nerve to talk to him he finds himself being kissed! When the object of his admiration proves to be more different than Takeo could ever imagine, is there any hope?

Story 5 has some crossover with a minor character from Boku no Shiru Anata no Hanashi.

From Attractive Fascinante:

Kazushi, an elite, met Harutomo, a cleaner whose dream is to become a chef. Because Harutomo has always been treasuring the change in seasons, after falling in love with him, Kazushi started to treasure the changes too. He found his world started to fill with colors and he finally understood the happiness of “giving”. Let Fujitani sensei take you through the seasons with this very lovely story on how this couple work hard towards their future together and how they manage through their long-distance relationship when Kazushi was posted overseas.

Yukito Kunisaki is a man traveling Japan in search of the "girl in the sky". Eventually he makes his way to a sleepy seaside town, where he meets a strange girl named Misuzu Kamio who has dreams of flying in the sky. During his stay in the town, Yukito meets other unique people and begins to learn more about Misuzu and the town she lives in.

The story is of Kitano Seiichirou, a very kind and pure-hearted young man, with a horrifying, monstrous face. People being what they are, they think he's a terrifying delinquent, and there are plenty of chance misunderstandings (coupled with Kitano's convenient inability to understand what's happening around him) that propel him into the position of "school guardian", a.k.a. head thug on campus.

An elite businessman exerting himself at a publishing company is demoted to the manga editorial department, which is out of his field of experience. Moreover, his first responsibility is a comic artist that no one can handle...

Slice of life manga about a group of clothing designers.

From ShoujoMagic:

Cool and gorgeous Nagisa paired with her perverted and stupid stepfather Ryunosuke makes for a hip-hop story that presents a father and daughter who cannot be honest with each other.

To celebrate the 10th anniversary of Azumanga Daioh, the manga is being repackaged into a new three-volume set, which will include three chapters of new material called Supplementary Materials.

Each new chapter covers one year of high school, with all new adventures for Sakaki, Yomi, Tomo, Chiyo, Osaka, and Kagura.

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.

This series goes through the love lives of the male members from a very beautiful family involved in fashion design.

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.

Now that Ira's older sister is getting married, who will take her to the bathroom after 10 p.m. and sing "Twinkle, Twinkle Little Star" outside the bathroom door in order to protect her from the beautiful, androgynous, child-eating clown? Will marrying a closeted gay man help?

Considered by many fans to be Ooshima's best work.

From Mangascreener:

Sakai and Shoji are two idiots. Their band, Moozmuz, is eccentric, flamboyant and silly. Gogh, their classmate, is a quiet but intense clothes designer. Watch the friendship between these three artists blossom and suffer, rendered in Shinkichi Kato's vibrant, lively art. The two volumes also contain a pair of one-shots each.

4-koma about how Black Rock Shooter chibi version protects the world.

Kyou and Asu are two sisters whose mother passed away while Asu was still a baby. After racking up an unbearable amount of debt due to his gambling addiction, their father disappeared - leaving the two siblings to fend for themselves.
Thus begins these two spirited girls' efforts to make ends meet while still enjoying their childhoods to the fullest. "No matter what hardships we have to endure, I'm happy so long as we're facing them together!"

A warm and sweet little slice-of-life story that will surely enrich you with a feeling of peace and good humour!