In the Kokoro series:

Vol.1 - Otokogokoro (A Man's Heart)

1 & 2. Otokogokoro & Otonagokoro
Salary man Saki almost makes it home but passes out from fever just as college student Shinomiya passes by. When Saki comes to he realizes he's in a strange apartment and Shinomiya has been taking care of him for the past two days! Not wanting to be indebted, Saki tries to repay him as thanks but Shinomiya's having nothing of it. Luckily, Saki's pretty creative when coming up with a way to express his gratitude that has them both wanting more...

3-4. Kiss Kiss Kiss

5. Nibukoi (Dull Love)

6. Hiiragi-senpai no Koi no Ohanashi

7. W Pure

Vol.2 - Koibitogokoro (Heart of Lover)

Vol.3 - Koigokoro (Heart of Love)

Vol.4 - Tokimekigokoro (Heart of Excitement)

The number of chapters comprising the main story in each book is as follows:
Otokogokoro (2 chapters),
Koibitogokoro (6 chapters + omake) entire book,
Koigokoro (2 chapters + omake), and
Tokimekigokoro (5 chapters + extras) entire book.

Yuuka has always had the hots for her classmate, Suzuki-kun, and tried to kiss him to show how she feels about him. However, when the chance came, she kissed the arrogant Makita-kun instead! She has always hated Makita, and they quarrel a lot. What will happen now that Makita thinks she liked him?!

Chigira Ruiji is a man born with the face of a demon. Trouble follows him wherever he goes. However, he just wants to live a normal high-school life, make some friends and even fall in love.

A girl finds out her quiet classmate's secret and decides to blackmail her.

16-year old Saji has nothing better to do than fantasize about beautiful young women all day. But he has his heart set on winning the affections of the school's headturner, Koizumi Akira. Problem is, the said girl won't even give him the time of the day. Ordinarily this would put off the typical admirer from further pursuing a fruitless endeavor, but for someone like Saji, a disconcerting cold shoulder is no trouble at all.

From myobi:

China, early Song Dynasty.

The setting is an era of absolute corruption, when bribery, torture, and threats were the normal way of doing business in the government. Then comes forth a young, new Official - Houjou - who challenges the corruption. Gifted by the Emperor with three beheading devices, he is charged with bringing justice back to the courts.

Based on the historical figure of Justice Bao (Chinese reading of the name), who was said to be an incorruptible official, this is a light-hearted romp through ancient China as he and his assistants work against the corruption that has become the norm in the Imperial Courts.

For more on the historical person and legends surrounding him, see:
http://en.wikipedia.org/wiki/Bao_Gong

Iwaki Kyousuke and Katou Yoji are two hugely popular adult film stars looking for a way out of the industry. Their chance arrives when they're both invited to audition for a new erotic film. Imagine their surprise when the director decides the only way for him to choose who will get the coveted lead role is for them to perform one of the film's love scenes on the spot—with each other! Things get even crazier when Katou decides to take drastic measures to ensure he can continue seeing Iwaki after film production wraps. How will Iwaki respond to Katou's impulsive act?

The story takes place on a island with no people to live on it expect one man named Oomori. While he was trying to sleep one night, a little spaceship landed in the water by his island. It appeared to be an alien named Jako. Jako's spaceship is broken so he has to stay there until it is fixed. He says he as come to Earth to learn of it's ways. And Oomori doesn't like people but decided to help him.

Julie’s family is very poor, and since she’s plain and ugly, as her sister has told her time and time again, she does most of the chores in her house. By accident, she meets the Yee family while trying to get her plane back from a tree in their yard. She meets the family again a year later and is adopted into their family. Soon she becomes a pawn between Mr. Yee’s new wife and his oldest son Ryan, both of which will use Julie as a means to hurt one another. Can Julie survive her new life till she’s of legal age to leave?


From Manga Jouhou:
This young girl is often mistreated by her family, being called ugly and useless. One day, she meets the new wife of the Yee family, which changes her life forever. The woman adopts her into her wealthy family, and now she lives with 3 other boys around her age. But for what purpose? Even though this is a miracle, the girl plans to leave the luxurious lifestyle once she turns 18. So see how she survives more than 10 years of her life.

From Hidoi~! Translators:
A young man who discovers he can have out of body experiences, which he uses at first to have fun but quickly leads him to discover that his life isn't what he thought it was, and people he knows have lives he never imagined. And then he meets this girl who has the same power and much more control...

Note: Shinsouban version includes two additional ending chapters.

From Viz:
The business of Death is never done. Asato Tsuzuki works as a Shinigami, or "Guardian of Death," in the Ministry of Hades. It's his duty to make sure that the souls of the dead reach the afterlife, but contrary ghosts and humanity's evils keep getting in the way of a job well done. With all these problem assignments, will he ever get a bonus... or will he be stuck paying back damages for all eternity?

Oneshot from Sayuri Hime

In "Traces of Snow," by Takahashi Mako, the protagonist goes to visit an old friend.

From Serenus Dreamers:
The main character is a pervert...!? What will become of the fate of the guy she wants to make as her boyfriend...!?

Contains three short stories: Tokyo Erougantsu, Vibration Age, & Love Honey

Onoda Nina is a 1st year student of her high school. She has a serious crush on her senpai, the handsome and kind Atsuhito Ogi. Ogi is the president of the ESP (Extra Sensory Perception) club, and only to win his heart she joins the club.

Turns out she has a tough rival, her senpai, Okada Ida who is a beauty and the idol of the school. Ida likes Ogi too and will never let Nina has his way with him. Soon they all find out that Nina actually possesses a powerful ESP, and this makes Ogi pays a lot of attention to her, much to her delight and Ida's distress.

Thus begins the adventure of Nina and her friends in ESP club, and of course her 'battles' with Ida to win Ogi.

• Sensei no Koto ga Suki Nan Desu
Sayumi has been in love with her neighbour Sou-chan for years. He is seven years her senior, so she decided to confess to him after entering high school. But what will she do when he suddenly becomes her homeroom teacher?

• Kyō mo ashita mo Sensei to

• Senpai ni, shitai koto

• Kimi o kirei ni shite ageru

Based off Mikito-p’s mega-hit Vocaloid song Sarishinohara, which was based on a true story, Sarishinohara follows the story of a high-school girl’s dream of becoming a star. However, her band decides to kick her out of the band right before their big debut… What is she to do now?

In the series:

V.1 - Sarishinohara

V.2 - Dear

Komomo is a spoiled princess who enjoys bossing her servants around. She has taken a particular liking to Natsu, the son of her family's favourite patissier; so the poor boy has to endure every one of her whims until his family moves away to France.
Years later, Komomo's family has lost their social standing, and the inexperienced girl is left in the care of strangers. Around the same time, Natsu returns to Japan as an acclaimed patissier. How will their paths cross after their lives and positions have changed so much?

From MangaHelpers:
The world is in a war against an alien race called "Mimics," who have taken over most of the world with a mission to eliminate the human race. Keiji Kiriya is a new recruit in the United Defense Force, which is battling against these "Mimics." On his first day of deployment, Keiji and his unit encounter "Mimics" and are all killed... Or was it all a dream? For some inexplicable reason, after every time he dies, he is resurrected and returned back to the day before the battle. Why does this happen to Keiji and how can he escape from this never ending cycle?

Note: Nominated for the Eisner award for the "Best U.S. Edition of International Material - Asia" in 2015.

From MangaHelpers:
Namidare Rekka has a very unusual birthright. After his 16th birthday, he will be drawn into many different stories. Each story has a heroine, and each story depends on him to be the hero. On his first day of high school, a strange uniformed girl that only he can see shows up. She claims to be from the future, and claims that his rescuing of many heroines is going to cause serious trouble for the future.
It's not long after this encounter that his troubles begin. His childhood friend Satsuki invites him somewhere, possibly to confess her feelings for him. However, before she can, she's kidnapped! Rekka wants desperately to help her, but he finds himself being tossed into various sci-fi and fantasy worlds, each with their own heroines in trouble. Will he be able to get back to Satsuki? Will he be able to save all the others? How can he really tell the consequences of his well-meaning actions?

Tsukasa is a magazine writer who has a sometimes boyfriend Atsushi, a gay porn star. They get along just fine, until Yui shows up, a yakuza from Tsukasa's past! Mix in a haunted house, ghost mystery, yakuza action, and plenty of adorable kitties and you have the latest new story from Miyamoto Kano!