From MangaHelpers:
In the year 2020, it was found out that a harmful virus had infected the human race, killing them slowly and bringing them towards a dark future. But with the technology they had in hand, in an attempt to save the civilized race, the people chose to go through with "Beast Transformation." Knowing that other than humans, all animals were safe from the virus, the humans made the decision to inject the genes of animals into themselves to become part-human, part-animal. In the end, the idea was "Either you do beast-transformation or die." With the race known as Homo Sapiens gone, by the year 2035, being a beast-human was normal.

In this new world, one strange boy, Kokuryuu Kazuto, 14 years old, is the worst runner and least athletic, but somehow also the most popular, with girls giving him hugs and boxed lunches, to his chagrin. But one day, he's approached by three girls, members of a group called the "Pure-bred Special Ward," who claim that Kazuto is actually a human, who should not even exist. Although he's in disbelief, he has to accept it as fact when he finds out his "ears" and "tail" are all fake. How will Kazuto face this dilemma, when he's a human in this beast-human driven world?

A manga adaptation of the first Medarot game. Created by Horuma Rin, the artist for the game series.

The story follows Hikaru Agata and his medarot, Metabee's adventures.

With SATs approaching closer and closer, can she protect the love and peace in this world? A tale about Han-Yurem, who became a magical girl in her 3rd year of highschool, and the mysteries that surround her.

Collection of oneshots:

1) Compass of the Heart
Miyahara Yoshimi is troubled by the gaudily dressed host who always comes into the convenience store where he works. But when Tsumagi Makoto passes out in front of the store, they become friends.

2) The Difficult Couple
Continuation of chapter 1.

3) Singing Stray Cat
Prequel to chapter 1.

4) From Rain
Accidental death, murder, guilt and punishment affect a man, his younger cousin and the cousin's best friend.

5) Summertime
When Haruhiko's summer plans with his girlfriend fall through, he ends up shuffled off to visit his cousin near the beach. But cute waiter Nanami looks so shocked to see him, have they met before?

6) As Long As There's Love, Age Doesn't Matter
Tomo wants a little affection from his cold older lover Reiji, and he's not speaking to him till he gets it. After two weeks, is it all over for Tomo and Reiji?

Tomboyish Himeko loves sports and playing with the boys, but longs to be a feminine, gentle girl like her name implies. When it looks like all is lost, suddenly a familiar face gives her a magical hair ribbon that grants Himeko the ability to appear like anyone in the human world in return for being a magical observation subject.

This is a remake of the classic shoujo manga and anime of the early 90's by Mizusawa Megumi.

Fifteen years ago, natality decreased greatly in Japan and the few who were born during that time are called the "Old Generation" or "Oldgens."
Hanasaka Haru, a 15-year-old Oldgen, has never met any classmates before. Now, he goes to school for the first time and meets Himeshiro Sakurako. But Sakurako is not quite the ideal classmate he imagined, and his dream school life isn't turning out the way he wanted it to...

Turtles. Tachibana Leo, 16 years old, hates that word. Because it reminds him of his childhood when he had to play with Tsuwabuki Tenma, a crazy girl with a huge love for animals. Poor Leo had to go through a lot of things because of Tenma. After studying overseas for 10 years, he comes back to Japan to take revenge on her but 10 years is a long time and a lot of things have changed since then, including Tenma herself.

Nakamura Kouta is a freshman in high school who dislikes girls. One day he is visited by his childhood friend Karen, with whom he lost contact over time. Karen is a tomboyish girl, who refers to herself as "Boku" (a first person pronoun usually used by males). She asks him to help her become more feminine to win the affection of Itsuki-san, a colleague at her part-time job. Even though he is reluctant at first, he more or less voluntarily agrees to help her out in the end. But making a lady out of the clumsy Karen with nothing but his extensive galge experience as reference proves more difficult than he could imagine.

Ken has never been good with words. However, he learned to overcome his shyness when his classmate Takumasa approached him with an exchange diary. In high school, problems start to arise in Ken's and Takumasa's relationship as they face their feelings, future paths and possible separation.

*There is an extra about another couple that is still untranslated.

IS (Pronounced Aiesu in Japanese) is not your everyday manga. This manga strictly deals with cases of intersexuality. IS stands for Inter Sexuality. This manga deals with very serious issues concerning intersexual people. The pain they go through, the troubles they confront, and ultimately their inability to reproduce and even find a partner who will accept them as they are - It's all there in a form of manga. The series is consisted of cases, each dealing with different people - although some cases are much longer and more dramatic than others. The first volume is about the case of Hiromi and the case of Ryoma. The third case is of Haru and characters related to him. If you don’t know what intersexuality is, refer to the Wikipedia on Intersex.

Mitsuru is beautiful, graceful and admired by many people, but she has a weird problem—a single, violent movement against her can get her begging sweetly for more! Her nickname M, also stands for masochistic.

Natsuhiko, is a guy who found out Mitsuru's secret on their first day of senior high school. Even so, he has an equally bad problem—the mere glimpse of his reflection can send him into a flying fit about how beautiful he is! He is nicknamed as N for narcissistic.

They both hope to minimize their chances of being exposed because of their weird behaviors.

Apart from the fact he’s in the student council and has quite strange tastes, Shima is an average, low-profile, quiet high schooler. Therefore, he doesn't understand why Ryuunosuke, a sports student, always glares at him every time they cross paths. Shima doesn't want to draw the punk’s attention, but the instinctive hostility of Ryuunosuke towards him troubles him, and he wants to know why the other boy hates him…

N/A

There is a serial killer in my house!

A group of high-school students had an accident on their way to a trip and died but they find themselves in a classroom with a black sphere.

School life never fails to be an alluring theme to the reader. Even more so if there’s romance involved. Musunde Hiraite chooses to take a quite innovative path in the description of high school romance, as it doesn't simply focus on a single character’s pubescent worries, but rather has a school-wide purview.

From Chibi Manga:

Because she loved drawing and wanted to do something special, she went to a famous art school.
And there she met the handsome and cool guy...

From Divine Sanctuary:
Ever since she was small, Sakurako has always been treated nicely by all the boys she meets. That made her get too full of herself, and one day, she caused a boy to be hurt very badly. If only she can meet him again to apologize and tell him her true feelings...

Plot revolves around high school freshman Shingo Susa as he is invited by his crush from middle school Sayuri Shiroyuki to the school's supernatural club. Over the course of the series Susa begins to gain supernatural powers, something that prodigy Rei Uryu, attempts to awaken to bring out the psychic giant, Susano Oh to destroy humanity and establish a new world order.

Won the 4th Kodansha Manga Award for Shounen in 1980.

From MangaHelpers:

Takahashi Ena is a high-school idol with a secret hobby. She often wears headphones, and people assume she is listening to music. In actuality, there is no music playing; she is eavesdropping! She prefers to listen to two of her male classmates, Nara and Mikage, because they have the most interesting conversations. She has to be careful to not be found out, though, because a creepy hobby like that could ruin her image! [tethysdust]