From Aerandria Scans:

"The moment you open the letter, you will be cursed. After reading the letter, you have to make two copies and send it to a close friend within 24 hours."

Everyone knows what it's like to pass notes in class. People carelessly write about things like love or gossip. One day, everything suddenly turns out evil...

Shiono was swimming in the sea one day, when a strange man grabbed her ankle. This is no ordinary man. He changes into a boy and then into a teenager. Just what she needs when she is trying to win the love of her school mate...

Akari has always lived in the shadow of Yuka, her older sister: less athletic, less smart, less beautiful. When she gets a call from a popular boy in her high school confessing his feelings to her sister, she goes along with the ruse of pretending to be Yuka because she feels bad about turning him down.

Kasumi was given a name favored by the gods so she would always be protected. Yet, when there is a drought in her village, she's the one chosen as the human sacrifice to go to beg the gods for rain. Her parents are sad, but Kasumi goes anyway. When she gets to the heavens, they try to send her back, but she won't go until her village sees rain, and now she's determined to become a fairy of the heavens. If it'll take 1000 years to learn to ride the clouds, she knows she'd better start now!

Onee-san Ringo has to take care of her imouto Mikan, since they are a single-mother household. When their mother is hospitalized, they cannot find a day-care, but the playboy classmate Kei recommends a yakuza-like day-care ... What shall happen now?

From Alice Dreams:

This is a collection of tied stories of classmates and their love lives revolving around their "cute school uniform".

Everyone wears the same uniform, but underneath, everyone has a unique story. Three conjoined shorts give a glimpse of what makes each student different.

Futaba, whose father is an oceanographer, has transferred schools 8 times because of his work. Afraid of eventually being forgotten, she tries not to make any new friends at her new school.

From Chuu Chuu Train:

"I want to make them more beautiful to let them be happier!"

The clumsy and friendly Yuri Ikuta together with cute guy Naozumi Mineta makes the perfect team. And their mission: To help 3000 girls get a makeover!

1) Uzakoi
Shuuji thinks that girlfriends become troublesome when they start saying 'annoying' things... which is why he always breaks up with them in a few days. The only girl who has been with him for the longest time is Risa... but she is 'just' his 'bed-friend'.

2) Suki desu Oniichan
Aoi loves her childhood friend, Koutarou-oniichan. However, he only sees her as a little sister. Aoi's like a child, both inside and out. When a rival appears, she attempts to surpass her in womanly charms.

3) Double☆Booking
When the twin boys who competed for her when they were little, return in high school, Misato still has trouble choosing between them.

4) Anata no Kioku
Nagisa has lost parts of her memory in an accident, or maybe it was fate that has chosen to make her forget some unpleasant memories. But can she really return back to the time that slipped out of her hands?

5) Sakura no Shita de Kiss wo Shite
Mahiro is afraid that her relationship with sensei will end upon her graduation. So she tries her best to not graduate...

Riu is the only daughter of Kioka Saenji, the 11th generation head of the famous Rokugi Kabuki theatre house. Since she was small, she has had a recurring dream about a man under the red moon - a man she didn't know, until she attended one of the performances of her brothers. The man turns out to be Rui, one of the heirs of the Akatsuki house.

The Akatsuki House is distantly related to the Rokugi House. Just recently, the 10th head of Akatsuki House, Ashikawa Enjuuro, died. The family is on the process of choosing his successor among the three adopted sons, one of which is Rui.

What relation will Riu have with Rui? Why does she dream of him dying every night?

A story about an online singing star who's afraid to let anyone know who she really is.

Two kids become friends, even though he has an incurable illness. One winter, he was told he wouldn't be able to live to the next spring and she...

From Anime Monitor: Yamada’s passionate storytelling is realized through her star character, Reiji, a violin prodigy with a troubled childhood. Reiji turns to music in order to escape his abusive family, and is enrolled in a prestigious music school. There, he meets his mentor Mitsuko whose own dreams of becoming a professional musician were lost due to a tragic injury. Mitsuko’s fun-loving nature and enthusiasm for living comes up against Reiji’s intense, single-minded passion for music. But together they find a common goal in Reiji’s dreams of success. Intense rivalries unfold against the backdrop of the musical world, while Reiji’s turmoil provides heightened emotional drama.

Collection of 3 short stories, the first two are Please save my earth related, but they are standalones and spoiler free: PSME-Things accidently left behind PSME-BIRTH Cibi-01 no YaYaYa! (Cibi, right, not Chibi)

In the Kioku Senmei series:

V.1 - Kioku Senmei
In the year 20XX the vast city of New York is under constant terrorist attacks at public places. The police is clueless and the culprit is roaming the city free. The police’s only witness died, and her clones are useless, so they are left with no choice but to receive the help of Jojo Schmit of the EPIA section, a section dedicated to ESP related phenomena.

V.2 - Guuzen ga Nokosumono (Things Accidentally Left Behind)

• Kioku Senmei II

• Birth

• Cibi-01 no Ya! Ya! Ya!

From JKP: Hana's a high school girl with a life that's only composed of one catastrophy after another. Her bad luck is only matched by her even worse temper and oversized ego. Tagging along are her best friend Sua and the poor victim Jiyong for some of the funniest misunderstandings and catastrophies. Vitamin's a korean Shoujo manga about comedy and love; made by the infamous Yeo Ho Kyoung. Highly recommended for some good laughs!

[From Tokyopop]: Beautiful Hyo-Bin Na is the new girl at school who everybody wants to meet. But Hyo-Bin is no normal high school student and she certainly has no desire to be popular. You see, she's cursed with supernatural abilities and by a dark and dangerous past. Everyone she has ever gotten close has ended up dead. Hyo-Bin doesn't want to go through the pain of lost friends and lost love again, so she vows to not get too close to anyone or to date anybody at her new school. But, alas, and of course, it isn't quite that easy ...

From Vampire Knights:

Since youth, Shin had a special ability to foresee dangerous situations. When his sister, Nao, was kidnapped by the people from a research center, Shin finally realized that he was not actually human, but a ‘virtual beast’ created in a genetic experiment. To solve the complicated mysteries revolving about himself and save his sister, Shin and his good friend, Tatsuki, embark on a perilous journey.

Violet is a girl whose mom pays no attention to her, or her father. What Violet wants more than anything else is a pretty dress and cookies that the other moms make. Then, one day, she meets a lady at the park who gives her what she desires...

1) Victory - Ai wa Kabu 2) Endless Game 3) Lesson on Love at First Sight 4) Blood Dream 5) The Summer Dream of Youth 6) The Adorable Straw Doll 7) White Christmas Eve