From xkazemg:

A slapstick/parody loosely based on One Thousand and One nights and other children’s fantasies. Princess Seblan was brought up as a prince to save her life… and she later turns into a real prince and lives happily ever after with his wife. Together with his sometimes-sarcastic magical horse Hendek, Seblan ventures out into the world of fairies, dragons, and other mystical creatures.

A collection of mildly ecchi otokonoko-styled stories focusing on crossdressing high-school boys and the boys who like them, mostly from the men's magazine Oto Nyan. Some of the stories are continued in Hiriajuu Shuudan ga Classmate o Josousasete Kanojo ni Shite Mita.

1-3. Raising Decoy
A boy helps his classmate go undercover in drag to catch subway gropers, and finds that he looks disturbingly good in a dress....

4. Ato no Matsuri (retitled Spilled Milk in the English edition)
A group of male students, having failed to get girlfriends, are becoming desperate; what will these "innocent" boys resort to?

5. Tenshi no Houbutsusen (Parabola)
Baseball-themed romance short.

6. Actress
A boy joins his high school's film club to meet the actress from their amateur film, but gets a surprise...

7. Shishiza no Boku to Natsu no Yozora (retitled Leo and the Night Sky of Summer in the English edition)
The president of the school astronomy club wants to catch UFOs.. maybe some "sexy female alien" costumes will help?

Set in early 20th century France, Claudine...! follows the story of a transgender man into adulthood. He struggles through life, being the first child after three older brothers to take after his father, and is constanly misgendered by those around him. He wants only to be able to find true love...

Included in Otoko no Ko Comic Anthology: Zettai Fukujuu-hen.

From Tokyopop:

Fujiwara Sunao is a rather unusual young lady. Not only does she prefer to wear her hair short and dress like a boy, but she also possesses the power to control water! One might think Fujiwara would be an odd fit at her school, but strangely, she's not. Between the destructive and demented school president, the kooky and somewhat stalker-like school nurse, and the obsessed underclassman who wants to be her apprentice, Fujiwara may be the sanest person at the school--which is a big help considering she may be asked to save it!

From MangaHelpers:
When an enemy explosion leaves private military soldier Terawaki Ryo nearly dead, a secret organization rebuilds his body using the research they have done in human revivals. Unfortunately for him, the technology only allows him to come back in the form of a teenage girl. His new identity, Shibahara Kyoko, leaves him distraught as his frail body doesn’t allow for the combat skills he used to have or even pick up heavy artillery he used in the combat field. Kyoko is assigned to protect a prestigious academy where daughters of powerful leaders attend since the girls’ presence makes it a hotspot for terrorists to attack and blackmail the people in power. Led by his former commander and mentor, Major Honjo who has also been reborn as Ryo, was a beautiful teenage girl named Chujo Shizuko, and the pair work together as anti-terrorist teenage school girls.

From Sweet Lunacy:
Who is the famous Rose Thief? Does Claude know who the maid (Christopher) really is?

From a_special:
The last scion of a fallen family enters a noble family's estate disguised as a female maid and must resist the amorous advances of his employer--who has secrets of his own!

At the peak of Beijing Operas, female roles were played by men. These men were required to have an excellent voice, postures and most importantly, beauty.

Satomi Azusa is a popular teenage gravure idol. She's also a highly talented baseball player, but, as a girl, she can't play on her school's team. Her father happens to be the coach of the team, and he concocts a scheme to allow her to play. His scheme involves Hirayama Keita, Azusa's childhood friend, a teenager of no particular talent. Keita's redeeming feature is that he looks a lot like Azusa. In fact, after putting Keita in a wig and girl's clothes, not even their parents can tell the two of them apart. To help Azusa's (and her father's) dream come true, Keita agrees to trade places with her during the baseball games. Soon "Hirayama Keita" becomes a popular player, and "he" begins to move towards a career in pro baseball. How long can Keita and Azusa keep up the act? What will happen when people find out?

Volume 1 also contains My Sweet Sunday.

From Chibi Manga: Plainful child. Akari is really attracted by the popular Unit of idols "Flower”. Then Akari get the chance to sing at the Flower's center?! But what is the secret that Flower keep…?!

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...