From JShoujo Scans:

1-3) Koutei Gentei
Mio and Ao are twins and they resemble each other in almost everything, beside the fact that Mio is a girl and Ao is a boy. They get along quite well and they always support each other, so when Ao tells Mio that he wants to become a member of LUNA, a group of young models, she is very excited. But unfortunately Ao can't attend the casting so Mio cuts her hair and decides to impersonate her brother for the casting. Though at the casting they immediately realize that "Ao" is actually a girl, they decide to let her...

4) Ijiwaru na Hitomi ni Kisu wo Shite
Akane and Akari are twins but they couldn't be more different. While Akane is a model, Akari is just a plain high-school girl. When Akari goes to her sister's work to deliver something she accidentally runs into Gaku, a very popular model, but had no idea who he is? Akane enlightens her, and soon after Gaku takes Akari on a date...

5) XXX ~My Little Honey~
Riko first met Joseph on a photo shoot when she was eight and fell in love with him. Seven years have passed but he doesn't see her as anything more than a little sister, much to Riko's annoyance. Can she get the older Joseph to see her as a woman?

Hino Akiharu lost his parents when he was an elementary student and was taken in by his uncle's family. One day, he sees on the news about the newly-established Hakureiryou Gakuin, a school which was re-built from an elite girls' school. He decides to take the exam for that school and succeeds in entering the House Management Department (the place to train maids & butlers). He wants to become a butler, although his appearance scares the ladies. Akiharu has a sinister look in his eyes, a scar on his right eyebrow, and bristled up hair. Add 3 piercings on his ears and he indeed has a typical bad boy look on him. He meets his "nemesis" at that school, Saikyou Tomomi, a girl with a two faced character who traumatized him many times since they were kids. Another girl named Cernia Iori FlameHeart chases after him because of his looks and calls him suspicious. Still, Akiharu starts finding his feet at the school and his relationships with the girls also get better...

The school comedy focuses on the Psychometrer character Mitsuru Fukushima, who has fallen into debt because of his love of cosplay. He plans to commit suicide in the forest around Mount Fuji, but he encounters the dead body of a female teacher named Mitsuko Fukushima who looks just like him. He begins life anew in women's clothing, helping to reform delinquent students.

Story about a tomboyish girl Subaru who's always cast in male roles for school plays and her subsequent confusion over her neighbour, Shun.

From Yen Press:

When the police discover Laon naked and hungry in the street, they aren’t quite sure what to make of the odd little boy. How could they know that he is actually a nine-tailed fox…or at least he would be if he hadn’t lost his tails in a bet? Now Laon is on a crusade to recover his missing appendages, if other spiritual forces don’t find them first!

This story takes place in the Victorian England.
Belle is a 16 year-old governess and fresh from the country on her first job. She expected life in London to be marvellous, though her charges are anything but lovely and her client is a miser. To make matters worse, a dead body was found in her trunk and Belle was charged as a murderer! But help comes in the form of Lady Ethel and Noel Scott.

N/A

Popular Hiroto uses viagra to be able to have sex with girls. One day a pretty girl approches him and invites for some fun. As he accepts, he does not suspect that he is going to have a big suprise that will make him learn something interesting about himself!

Note: The first 2 chapters were incorporated into Mayonaka Love Alliance and ostensibly completed the story, but a continuation was recently begun in Qpa magazine.

From Aerandria Scans:

In a world where people with green eyes are despised and named as bringer of plagues and destruction, Sue seeks a cure for her ailing friend. A holy nun comes into town one day to cure the sick and drive out the plagues. Due to desperation and lack of money, Sue decides to kidnap the nun to plead with her to heal her friend. What she didn’t bargain for what suddenly facing a green-eyed devil!

Girls in our family have a secret, and it's only lifted after child-birth. The beautiful Zi Wen has this secret, and through thick and thin she cannot tell anyone, not even her best friends. If they knew her secret ... ah - she doesn't even want to think about it! If Wu Nan and Rui Ling knew she wasn't really a "she", would they even want her friendship?

Akiyama Youichi is a high-school boy who adores the cute Nana-chan from afar but he's clueless about girls and terrified of asking her out on a date. He discovers in a very peculiar manner that he has a love rival for Nana-chan's affections in the curvy and sexy shape of Natsuhara Yuri, a classmate and (platonic) best friend of Nana-chan. The battle for Nana-chan's affections is joined with Youichi trapped in Yuri's body and Yuri using Youichi's body to ask Nana-chan out on a date. May the best, umm, person win!

Popular playboy Kanzaki has his eye on Asahina, who practices basketball diligently. Only problem is... they're both guys! Or so he thinks...until an unexpected accident uncovers his crush's true identity as a girl. But why is Asahina cross-dressing in a co-ed school? Rivalry and romance begins in the basketball club!

Naraski's job is scouting for girls in the city and tricking them into working for the porn industry. One day, however, he meets his match when he gets played by a cross-dressing guy who turns out to be a lot more dominating than he looks.

Includes the unrelated one-shot, Megami ni Koishita Sakura-kun no Junan (unscanlated).

Kouta's school-year is off to a great start; this year he and lovely Ayano are in the same class—and they're sitting next to each other! Here's the problem: whenever Kouta gets excited he passes out—and wakes up in a stuffed toy. (No, he's not cosplaying—he is the stuffed toy.) It's never the same toy and it always seems to have some sexy girl hugging it close. Then his childhood friend Ako gets involved and Kouta begins to realize Ako is not a child anymore...

From Hachimitsu:
A trap named Nono goes to his lesbian friend, Sei, to become cuter than he already is...

A collection of short stories. Note that the vast majority of these stories contain heterosexual romance themes. A few stories explore transgender issues, but it's a stretch to call them shounen-ai or BL romances. This series demographic is josei.

Le théâtre de A
1.Oeufs D'ange - Tenshi no Tamago
A man is asked by a young painter to be her model.

2. Velvet Going Underground
A doll becomes a super idol. Hijinks ensue.

3. Childhood's End
Alastair runs away and meets the Rabbit.

4. Bite Me Something
Allistaire followed Mr. Rabbit all the way to Wonderland. Will he be able to find him among the crowd?

5. Long Along Alonging
A girl asks a vampire to be his apprentice. But what is her motive?

6. Till Dawn
In a dark tower, a caged voice is singing until a hunted man enters the darkness.

7. Leçon un
Sequel to Long Along Alonging.

8. My Skin on My Back

9. Highland Walker
Sequel to Leçon un.

10. Perfect World
The story of a young wife whose husband is infected with a fatal disease called Flower-Blossomitis.

11. Perfect Lady
Sequel to Perfect World and drawn especially for this book.

12-13. Looks Like a Teaspoon
A boy named Allistaire is often teased at his all-boys school. One night he dresses like a girl and stumbles upon the boy who often bullies him, Simon. Allistaire runs off into a tower and as Simon runs after him, we see the sign "Welcome to Wonderland" hanging by the tower's door.

14. The Pearl Blue Story
Do you believe in mermaids? Coggy, a young boy finds a mysterious lady laying down near the shore of the beach. He brings her home to help her.

15. I Am a Piano
A piano tells the story of her life and the people she encounters.

16. Parade

Le théâtre de B
1. Noël
A short story about a holiday romance.

2. Teddy Bear Satsujin Jiken (The Teddy Bear Murder Case)
Four murders have taken place at an all girl school. Lying beside each of the victim was a teddy bear with one missing limb.

3. Yonshimai Satsujin Jiken

4. A is for Alice
Alastair, a grown man, is off to follow the Rabbit once again to return to Wonderland.

5. Nedai no Musume Atelier no Musume (The Bedroom Girl, The Sculpture Room Girl)
A story about a girl in her death bed finding another chance in life in the body of a doll.

6. B&W (Black&White)
A story about a boy waiting for his sister.

7. Le Jardin du thé (The Tea Garden)
A mysterious story about a poor young man who orders a kind of tea called Huan Ying – “The Illusion”.

8-9. Free Fitting for Her
A priest and his captured vampire must save a naive and selfish young girl from the murderous desires of a Lolicon. But perhaps this girl isn't all that she seems.

10. Rose Dusk, Pale Moon

11. Hello, My Sister

12. The Happy Prince

13. Welcome to Wonderland
Simon, Alastair's old classmate, is now a grown man who bumps into his childhood Wonderland traveller.

Yuuma Yamabuki has just moved to a new town where he meets Laira, a cross-dressing boy who asks for Yuuma's help. Yuuma must cross-dress to follow Laira back to his all-girl school where he meets the others in the Girl Research Society.

For the sake of his little sister, a boy tries his best at becoming a star gravure idol.

From ShoujoMagic:
There is a legend in the kingdom of Paros -- a legend of the Sword. It is said that if one who is unfit to rule should wield it, it will mean the ruin of the kingdom. As sole heir to the throne of Paros, Princess Erminia must accept the Sword and a husband when she comes of age on her next birthday. But the princess refuses to wed any man who is less of a man than she -- which excludes every man in the kingdom! Just when Erminia is ordered by her father the king to wed her foster brother Yurias, she has a fateful encounter with the unfortunate, beautiful maiden Fiona..!? "The Sword of Paros" is a miraculous romantic fantasy about defying convention, transcending gender and status, and knowing oneself.