Description from Viz: The story A, A' raises a troubling question: How would you feel if your lover died - and was replaced by a clone? Could you recreate your relationship with someone who was physically exactly the same but didn't share any memories of your life together? In 4/4, teenaged Mori flunks out of an ESP training program. But when he meets Trill, a beautiful Unicorn, his latent abilities begin to blossom... In X+Y, Hagio uses science fiction to explore questions of gender and sexual identity. Time has passed, and once again, Mori finds himself inexorably attracted to a member of the unicorn race - but this unicorn is male... and so is Mori. X+Y won Seiun Award in manga category in 1985

From: Easy Going Scans

Alto, a 12-year-old kid, has arrived to Porto Grande, the largest city in the country. His dream is to fly an airplane which only women can pilot. In order to fly, he disguises his gender and age and enrolls himself in an all girls school. What kind of a school life awaits him behind those closed doors?

From Intercross:

Being left alone on Christmas Eve, Ten is mad; her brothers have all cancelled on her. But then a strange boy comes to the rescue and claims that his name is No. 10?!

After that strange night, she wakes up to find a name tag of the boy who is named Tohga. With determination to find him in her mind, she sets foot to find him and eventually ends up in the very school that he is from.

Gerard, a college student in the US, was helped by Sharl when he was being bullied. Unbeknownst to him though, Sharl is the son of middle eastern oil tycoon. The story revolves around their friendship as it develops, and the path to understanding their true selves.

From Yen Press:

As punishment for slacking on the job, the shinigami Lapan is ordered to go to the Human Realm in the body of a skeleton to retrieve a wandering soul. However, much to Lapan’s lecherous delight, a slip-up lands his soul in the body of the young Alice, a buxom student at a local all-girls’ school. With the skirt-chasing shinigami (as Alice) leaving a storm of sexual harassment allegations in his wake, whatever is poor, beskeletoned Alice to do?!

Amagai Gakuen, a prestigious school for boys, was hit by an unusual spring storm during the entrance ceremony. Five boys - Hazuki, Toma, Yusuke, Madoka and Junta - were all caught in the storm's violence and were affected by a strange phenomenon. All of them were transformed into girls!! Inevitably they will meet someone and fall in love. Bikke wholeheartedly introduces this new, beautifully drawn series about boys and girls coming of age.

From Tokyopop: Inez is a young orphan girl with a special gift that allows her to communicate with all creatures. A great destiny awaits her, the nature of which she is yet unaware. As our story opens, Inez is traveling with an old wizard named Kaager and a faithful dog named Zode. Her country is about to plunge into its first winter in one hundred years and ominous signs abound concerning the return of a demon-race which threatens the country's fragile peace. Can little Inez- via a magic amulet - bring back her country's ancient dragon protector in time?

Iori always liked Naoto, even though Naoto cannot accept the fact than someone from the same sex is in love with him. But seeing the sad expression on Iori´s face, he can no longer refuse Iori´s feelings...

This is the continuation of the younger brother story from Self Portrait...

From Tokyopop:
From a small lake nestled in a secluded forest far from the edge of town something strange emerged one day: Three young girls. The three girls, Shem, Hamu and Japheth, are sisters from another world. Equipped with magical powers, they are charged with saving all the creatures of Earth from becoming extinct. However, there is someone or something sinister trying to stop them. While saving our world from destruction, these sisters live like normal human girls: They go to school, work at a flower shop, hang around with friends and even fall in love...

"Basara - The spirit of freedom which denies old authority, transcending traditions and customs."

Born under a prophecy that will liberate and unite Japan, Sarasa has had to take her brother Tatara's place as the "Boy of Destiny." Fighting for the oppressed, Sarasa journeys across Japan to gain allies and defeat her enemies--all while keeping her identity a secret!

Basara won the Shogakukan Manga Award for shoujo in 1992.

Collection of love stories:

1) Butterfly Cloud by ASHIHARA Hinako
N Island is a small island where all the kids know each other, and they're excited to meet the new transfer student from Tokyo. Fifth grader Kanta doesn't want it to be a girl, because his classmate Kyo is the only icky girl the island needs. In a way that makes Kyo happy -- because she's always known she wants to live out her life on the island as Kanta's wife someday. But the transfer student, Ritsuka, is a girl, and a shy one with a mother who's shunned by the island. So Kyo makes it her mission of good faith to assimilate Ritsuka, but then Kanta starts acting more interested in Ritsuka than in Kyo... When the main cloud splits into a butterfly cloud, which girl will be the one to separate from the rest...?
This story was released as a oneshot in Chouchou Kumo.

2) Racing Queen by IZUMI Kaneyoshi
When it comes to being a racing queen (it's like being a cheerleader for Nascar), you're either a bitch or a lost puppy. Ei learns this lesson the hard way from Akane, the reigning racing queen of the famous Meitoh Team, when Ei joins the team to put herself through college. It's only by doing harm to others that you succeed, and once you've succeeded, everyone wants to do harm to you. Ei's dream was to be the top racing queen, but once she gets there, it turns into her worst nightmare...
This story was released as a oneshot in Ni no Hime no Monogatari.

3) English Garden by SAKURAKOJI Kanoko
Hayato is moving to England in one month, so he approaches Fumio and tells her to date him -- almost like a command. He's dominating, stubborn, and selfish, and Fumio really can't say no. But Hayato isn't without his charm; he has a talent for making things grow, and he designed a gorgeous English garden. Now he wants to spend his last month in Japan building a garden with Fumio. As the garden grows and changes, so do its gardeners... and as time becomes strained, so do their emotions... This story was released as a oneshot in Baby, Star.

4) Pure White Anniversary by AYASE Riu
Just by selecting her, and saying her name, she became the class´ representative, and after time, trusted by teachers and students. That always maked her excited about working hard and being better. But, not all is white, not all is pure, when she was in trouble, A guy suddenly appears to help! Who is this guy? Why is he helping her? And, why does Sakura feels scared whenever she is with him? Well... we sure want to know.

5) The Coffee Shop that Ends Unrequited Love by ADACHI Keiko
This story is about a girl called Rui. She's always too late on dates. But when she met Shiyouta she fell in love with him an want to be not late anymore...

6) Great Waiters? by WASHIO Mie
At 175 cm, Eisei (real name Haruyo) never thought she would ever find a boyfriend because of her height and her rather tomboyish looks and demeanour. Under her friends' recommendation, however, a visit to the renowned 'Hot Cafe' caused her to fall for a charming waiter named Kono... who promptly dragged her to fill the vacancy -- as a male waiter?! Having a chance to get closer to him is one thing, but has Kono also accidentally mistaken her for a boy?! How is Eisei supposed to express her feeling for him now? With a cafe filled with handsome waiters and the pretty girls who swoon over them, this 'pretty boy' has work cut out for her!
This story was released as a oneshot in Kanojo ga Cafe ni Kayou Wake anthology volume.

Yuuki Kimino is a very boyish-girl who saves girlish-boy (and crossdresser) Izumi Junichirou from a train molester. Jealous of his "girl-power", Jun-chan agrees to coach Yuuki on being more girly in hopes that she too can be called cute. However, despite being a girl, acting and dressing like one might be a little tougher than she'd think.

A collection of one shot stories from Takako Shimura, the author of Hourou Musuko and Sweet Blue Flowers. These stories deal with issues relating to gender, romance, ideals of beauty, and relationships with parents.

1. He said "I'm a girl"
2. Rakuen ni Ikou (Let's go to the Paradise)
3. Shounen no Musume (Boy's Daughter)
4. The Theme of Akemi ver. Teruo
5. The Theme of Akemi ver. Yoshio
6. The Theme of Akemi ver. Haruo

7. The Flower
Contains the Transient Son character Yuki.

8. Sweet 16
A short, bittersweet story in which a girl realizes she's in love with her tutor, who's in love with someone else. The other main plot point is the main character's dread of the upcoming school marathon.

In recent years, more and more girls are experiencing the development of "tertiary sexual characteristics" during the later years of their puberty -- that is, the rapid masculinization of a certain part of their external genitalia. Ooi Haruka is one such girl, who has until now kept the changes in her body a secret from everyone but her family. However, after an embarassing incident involving the guy she's been crushing on in a crowded train, she wakes up to discover herself at school, surrounded by a group of students calling themselves the "Bra Girls (Swing Girls)." And they know her secret!?

By anonymous:
Nohae has been crushing on Dona, his neighbor, since they were younger. Dona is a girl who was obsessed with money as a child and would make her childhood friend Nohae actually pay her. Time has passed and now she's a teen, broke and living on the streets with her dad. Her dad meets Nohae and arranges for Dona to live with him. But Dona's not your typical heroine. She's one of those fake people, maintaining a perfect image at school but in front of her parents she's self-absorbed, a glutton, and is quick to nab a meal or swindle money. She's quick to anger and has a grudge against Nohae, but he likes her so much he's completely unaware.

From StarryHeaven:

High school first year Sara has a secret…she’s really the super-popular singer SALA! However, as an idol her gender is kept a secret from the world in order to sell her music. But can Sara win when she wants to be just Sara…?

Jail: Risk Hunter number one! He can alter his appearance using "Kara" and uses it wisely to kick his enemies' ass.

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"Risk hunters" are professionals who handle jobs considered too tough for normal law enforcement, such as kidnappings, combating terrorism, and preventing murders. One man who stands above them all however is the legendary Chameleon Jail, who has the ability to manipulate his "kara" or internal human body energy in order to physically change his appearance into that of any other person.

Throughout the series, he pursues several assignments on behalf of various clients given to him by Shall, a woman who runs a detective agency in New York City. All difficult, the successful completion of these assignments hinges on Jail's ability to change his appearance when the time is right.

From Attractive Fascinante:
Yuu, Kouichirou, Natsume and Shino are classmates.

1-2) Yuu-kun's Love & Kouichirou-kun' Love
Kouichirou took really good care of Yuu since young. Yuu was afraid that Kouichirou would leave him behind if his grades dropped so he worked really hard and got a fever. When Yuu kicked up a fuss in the infirmary, Kouichirou kissed him. What did that kiss mean?

3-4) Natsume-kun's Love & Shino-kun's Love
Natsume and Shino had been sex buddies for quite some time. Although they had feelings for each other, they never confessed to each other. Shino finally broke down and confessed. Would Natsume accept him?

5) Light Whispers

What if the Meiji Restoration never happened? Bakufu still holds sway, the class system has never been abolished, and there is no westernization. The story is set in modern-era Edo, which had never been renamed to Tokyo, where people go to Kabuki for entertainment and hang out at pancake house. It centers around Sobi, the sister of an Edo magistrate who goes to school with Michisato, who prefers to be called Michel, the eccentric son of the ruling Tokugawa clan's Mito family.