From Yaoi Is Life:

Saichi and Kotetsu are drawing manga as a team while living in extreme poverty. At loss for an idea, both of them decided to write a “real BL” based on themselves! They rise to be a star in the BL world, but…?!

"The other short stories within explore a schoolboy crush that turns into something more, an antagonistic relationship between a wealthy heir and his crush, and the love life of Usaki, the editor of Saichi and Kotetsu’s stories" (June).

From MangaHelpers:

Shou lives out in the country. He has a big crush on his childhood friend Sora, but is afraid that she thinks of him only as a little brother. One day, Sora announces that she was abducted by aliens. Later that day, Shou confesses his feelings for her and she dies shortly afterward. Shou is still in shock from her loss, when an alien girl named Lila comes down from the sky. She has a disk that contains a brain scan of Sora, and she can run Sora's personality in her own body. She also wants to have a child with him. Will Shou be able to cope with all of these sudden changes, and will he be able to keep Sora with him after all?

One social outcast unleashes a cross counter that will change the world! A raging storm of fighting action!

Shotaro Mitarai has given up on life, but when he visits the great forests of Mt. Fuji to end it all, he's attacked by the Suicide Hunters. On the tip of a gruesome lynching and faced with a tragic death, the seeds of rage sprout within Shotaro! What course of action will he take from within the inferno of anger?!

Awaken! Stand and fight! Let the gong of your soul sound true!

The spin-off of the popular fantasy manga "Fairy Tail". Consists of 3 volumes

Volume 1: Kengami no Souryuu / Twin Dragons of Sabertooth
Sting, who became the master of Sabertooth, Rogue, Yukino, and Minerva together perform jobs together, but...? What is the danger approaching their guild and the whole continent!? The episode that was not shown in the original story is now being told!!

Volume 2: Rhodonite / Road Knight
Spin-off of Fairy Tail following Gajeel and his past.

Volume 3: Raigo Issen / Flash of Great Lightning
The story centers Laxus Dreyar, the Thunder God Tribe, and the time they were affiliated with Blue Pegasus.

Meguro Mito has always been made fun of for her chubby appearance. Her sole happiness is discussing her favorite role-play game with her two best friends. One day, while she is being bullied, a handsome classmate saves her. Is this the beginning of her first love?

From Manga Box:
One day, a yakuza gang member is attacked in Roppongi, Tokyo. This is only a prologue to one man's revenge story, triggered by the events of twenty-two years ago. The flames of revenge burn in the darkness of the city. By the author of Hitoshi Tadano, Chief of Special Operations, Kimio Yanagizawa.

Tegami Bachi (or Letter Bees) are couriers that deliver important letters and packages throughout the land of eternal dusk, Amber Ground.

The story revolves around Lag Seeing, a young boy who was born on The Day of Flicker, 12 years ago when the man-made sun went down for unknown reasons. The manga follows his ambition to become a Letter Bee and how he follows the path of his idol Gauche Suede who suddenly went missing one day...

Mori, a cheerful playboy in his sixth year of college, has just fallen in love with a high school girl named Hoshi. From that starting point, Mizu no Iro Gin no Tsuki portrays the relationships among Mori's friends and acquaintances.

Vol 1 contains work originally published in 1998-2000, which was previously collected into a 2000 tankoubon entitled Mizu to Gin. Vol 2 contains work published in 2005-2006.

From JanimeS: Princess is a very straight forward and sad series. This series is full of romance and politics. The background is an unknown medieval era where there are three countries. Among the three countries, there is an island country called "Ramira". The empire, Ramira, is where most of stories will unfold. There are generations of princesses, and the first 27 volumes set the story for the eventual regaining of Ramira by the greatest Empress of Ramira, Preia, who was beloved by the people and had many loyal men under her.

Even if people are born with super powers, they must serve as sidekicks of superheroes in order to become superheroes themselves. Lamia a.k.a Dream Girl has the power to make people fall asleep. She is the sidekick of Darkslug, who is not a great hero compared to his reputation. One day, Dream Girl and Theo work together to get rid of villains and save the world.

This manhua is a collection of short stories by this author. It is almost similar to the German Brothers Grimm's stories. However, these hold no morals but are more of a twisted outlook on life.

Short story about a girl with a monster face

Plants have taken over the planet.
In 2017, the vegetation in Tokyo rose up and toppled human society in moments.
The few survivors are forced to live in the relative safety of a subway network, but supplies are running low.
Join an average high school student named Akira as he challenges the plants in a struggle for survival!

"Three years ago, he had the same posture.
Three years ago, he had stood behind Miyuki.
Yes.... Compared to three years ago, it had changed."

Set three years prior to the present time, Tsuioku Hen tells the events that would change Miyuki's world drastically, as well as the events that led Tatsuya to become what he is now.

(Adaption of Light Novel v08)

A year has passed since the Demans took over the island. The humans await a savior. A tale of a crimson knight that appears before them.

From Easy Going Scans:
A tranquil tale about Shuhei Amamiya, who transfers to Moriwaki Elementary filled with hope and ambition about his new life. But it doesn't take long before he gets picked on by the class bullies, and gets involved in a dare to play the mysterious piano in the forest, leading to his meeting an enigmatic child that goes by the name of Kai Ichinose, who seems to be the only one capable of getting sound out of the thought-to-be broken piano. His ability earns him the respect of Shuhei and his music teacher, former master pianist Sosuke Ajino. At first Kai is resistant to refining his art but after hearing Sosuke play a Chopin piece he just can't seem to play by himself, he relents.

Note: Received the Grand Prize for best manga at the 12th Japan Media Arts Festival in 2008.

After a mission gone awry, the doubtful main character, Rood, is sent to a famous magic school, Helios. Here, he must protect an important person's son who has a very bad time at the school.

19 years old she vs 31 years old she. Is she two individuals? The childhood version of her came beyond time to meet her boyfriend. The current girlfriend and young girlfriend faces confusion and bewilderment?

From Lucia Rose:
Amane Mikiko, better known as Mikki, is an elementary school student who moves a lot and has to transfer schools often. As soon as she makes friends, she has to painfully say goodbye to them. She is determined to not make any new friends at her new school, but it doesn't exactly go her way. Especially when she meets a boy with the head of a cat! But hold on, he only looks like that in her eyes?

V.1 - Gouin Sakka to Makeinu no Hatsukoi

Out of orders from his office, young model Nanami Jun becomes an assistant of a doujin artist! The said doujin artist turns out to be none other than the supermodel whom Jun had greatly admired from a while back, Kase Yuutai. Before long, he is immersed in joy, and even as he is messed around with and has to dress up erotically after references in doujinshi, he still wishes to love Kase! It is the love of an ore-sama ero doujin artist and an egoistic model.
- Crownprince Translations

V.2 - Gouin Sakka to Hinadori no Katakoi