From Vices and Devices:

Economist Vittorio Conti wants to see what having sex with a man is like, and does what any reasonable person would do in his situation: ask his bodyguard if he wants to give it a try. Straightlaced Armando Pagani refuses at first, but for how much longer?

1) La Scorta (The Escort)

2) Gino e Vittorio (Gino and Vittorio)

3) Amato Amaro (Beloved Bitter)

4) Bandoliera (Bandolier)

5) Differenza (Difference)

6) Tatuaggio (Tattoo)

7) Partita (Match/Game)

8) Gelateria di Marcello (Marcello's Gelateria)

9) Carraro no Hishio (Carroro's Private Secretary)

From RebelliousArt:
Minato is a clumsy high school girl. When she went to the infirmary to lie down, she found a naked guy, and he kissed her!
The guy is Chihiro, a tenth grader who is one year younger than she is. Minato is very interested in him, but he already has a girlfriend. Minato plans to give up, but...?

*Includes several short stories:
• Amai Yokubou (Sweet Desire) in volume 5:
After being dumped, Maya is accused by men as being cold and frigid. An encounter with a stranger leaves her thinking differently, but somehow this stranger knows her name.

• Only One in volume 6
• Fake Lover in volume 7

1-3) Sweet Warmth
After a difficult time of being dumped by his lover and getting hurt by falling down the stairs, Shinshu meets Fushimi at work, where he is assigned to help him due to his injury. Fushimi is tender and thoughtful towards him, which is a different experience for Shinshu.

4) Kiss at Midnight
When childish and spoiled Harumi gets rejected by his housemate whom he loves, he moves in with Hisaya who has always been there to pick up the pieces for him.

5) If Love is Secondary
Natsuhiko gets drunk one night and is taken home by Jin. Natsuhiko seduces Jin, only to realize later that Jin is his college crush who turned him down! Jin was such a playboy back then, has he changed at all?

6) The Love that Follows You
Takashi is ready to propose to his girlfriend, but she never shows up for their date. At her apartment he finds a note and her younger brother Yukinari. With his girlfriend gone, Takashi starts spending time with the lonely Yukinari, but is he only a father figure to the younger man?

From Attractive Fascinante:

1-4) Sweet Promise
A sexy and cool French restaurant boss, Sonobe Munekazu, suddenly appeared in front of Hisaya and took him home after saving Hisaya from his violent ex-lover. Hisaya started working in the restaurant later while staying together with boss. Love sparks flew and jealousy arose when the boss’s friend, Nagamori Kyou, appeared. Hisaya began to doubt himself and the boss. Was there a real reason for the boss to pick up a total stranger? And was Hisaya just another person the boss decided to help out or is there something more to it than simple kindness?

5) Don-Kan Darling

Original doujinshi by Yuririn no Moto (ゆりりんの素)

From MangaHelpers:

The story begins with regret, chaos, and desperation. Sora lives with his little sister, An, and his rather comical father. An is the soloist of her school's chorus, and Sora is an awesome cook. Sora prepares his "honki" (serious) bento for his sister's school concert.

Once An begins her solo, a mysterious force creates a rift in reality, as An's existense shatters right before everyone's eyes. Sora runs in to save her, but he too becomes part of this dark ritual. As Sora ends up transported to a fantasy world full of gigantic mushrooms, nothing can be certain on what will happen to these two.

A collection of stories focusing on all the heroines within the Amagami series.

Based on the visual novel by Enterbrain with the same name.

Note: This manga focuses on all of the girls at once, instead of different arcs.

I gave a guy I didn’t like a love potion? Hong Yoo, quarreling with top star Ji Sulwoo due to a wretched first meeting, fed Sulwoo a love potion one day. That shady love potion…did he really drink it?!

Sakaki, the president of an interior designing company, is determined to never get serious with anyone - fearing the heartache he feels that it is sure to cause.
Much to his discomfort, he realizes that he is beginning to fall in love with his older heterosexual co-worker, Okada.

Sakaki is shocked when he finds himself in Okada's home one day, with no recollection of how he got there. At first convinced that he did not act out-of-line at any point, Sakaki feels more and more unsure of this as he notices the changes in Okada's behaviour towards him.

Will this storm that's brewing on the horizon ever calm down?

(Sakaki also appears as a minor character in Signal, a story set two years prior to the events in "After a Storm")

Takatoki is a high-school boy with an intense obsession for manga and anime. He desperately wants a typical anime romance with a girl who falls into a typical female anime stereotype. His childhood friend Chiyoko, a very unladylike girl who is a notorious fighter, tries in vain to get his mind back to reality.

One day, the two of them run into a girl in a sailor schoolgirl outfit being threatened by a generic band of thugs. As Chiyoko beats up the thugs, Takatoki learns that the girl, Asadzuma Youtsugi, is a cosplayer who wants to lead the life of an anime character. Was this Takatoki's fated first encounter with his future anime lover!?

"In a Fight, they say that the first one to bleed from his or her nose is the loser. Father, Mother and Brother...They're all LOSERS that bled from the nose facing that damn monster called WORLD!

I'm not going to fall into that one. Even though I have to break my head, I'm not going to bow my head before anyone. I'm going to finish everyone! I'm going to throw everyone on the ground with the "Ushi Mata".
Even though my opponent is...a GIRL"

The Boy that doesn't bow his head to anyone...
SUK DONGMIN

Set within a ravaged world, a girl protects the people from these monsters is interwoven into this mysterious fantasy.

This is a oneshot from the Moonsorrow Collection II.

"Originial" doujinshi by the circle Moonsorrow.

From ADV:

A mysterious creature has fallen from the sky and landed right at young Yuina's feet! Branded as the master of this new angelic being, Yuina is forced into an otherworldly pact, one that will take her beyond the clouds and into battle against a new and yet hauntingly familiar evil, one that patiently waits in the shadows.

From ShoujoMagic:

"Forgive me. I can't become a servant of the Lord yet," Maria says as she runs from her vows ceremony at the convent where she was orphaned 16 years ago. She has received another letter from the mysterious "G," her faceless benefactor. She is not as alone in the world as she thinks; "G" writes that she has a relative at Hakuhou Academy who is in need of her guidance, but he cannot tell her this relative's name. Trying to enroll and search the school presents Maria with a number of problems, however -- the foremost of which is: Hakuhou is an all boys school!

A legendary dragon once brought the land of Astoria to the brink of ruin. He was defeated by a man named Yurius, who was soon supposed to go to his princess and live happily ever after. However, with the last of his strength, the dragon placed a curse on Yurius: all his memories will be erased, and his body will turn back to a child. It is now the goal of a novelist, Elliot, to return Yurius to the courageous person he once was.

The story revolves around a mysterious place called "Angel's Island" that resides somewhere on the ocean seas. Living on Angel's Island are a species of merpeople that can live in both the sea and on land. They have the form of a human, but can breath in water as well as on land. Luna is a princess of this species of mermaid living on Angel's Island, but is exiled for breaking some of their rules. As punishment, she is placed inside a sea shell, and set adrift across the sea. Meanwhile Eiji Kusahara, the son of a wealthy Japanese family, meets Soleiu (Luna's older sister) and they try to discover the mysteries behind Angel's Island.

From MangaArt:
The story begins when Hui-Sheng, a seemingly ordinary high school girl, receives a deck of angel cards from a mysterious stranger, Jason. With the angel cards, Hui-Sheng attempts to find out who her guardian angel is. But the result of the reading (a blank card) shows that she has none...

Shiina Amane is special. Her father is an exorcist, and she herself can see spirits. But gifts always come with a price.

The series takes place in a universe parallel to City Hunter.

A young Taiwanese assassin codenamed "Glass Heart" committed suicide by jumping off a building, and her heart was pierced by a metal fence. Miraculously, her life was saved by heart transplantation. During her recovery she began to experience strange dreams, which led her to Japan looking for the donor of her heart, who happens to be Kaori Makimura, former partner of City Hunter.