From Neptise Scans:

The story follows Shintaro, the Ganma Army's #1, after he gets stranded on the wacky Papuwa Island.

From Blissful Sin:

After stomach cramps land Muramachi Koharu in a bed at the nurse’s office on the very first day at his new school, he suddenly wakes up to find himself on the landing just before the roof door. And there’s a student he doesn’t know sitting right next to him!
“Where am I? Who are you?”
The student says he’s one year Koharu’s senior and leans closer and closer to him…!
He pushes Koharu down… And suddenly kisses him!

A romantic comedy that tells the story of the faithful yet stupid senpai Oosugi and Koharu, a transfer student who’s too nice to say no. ♥

How far can you kill? An insect? A fish? A snake? A dog? Or a person?

A collection of oneshots with a unique twist to some typical BL tropes.

From MangaHelpers:

Scientists predicted an imminent meteor impact on Earth that would annihilate civilization, but contrary to their prediction, the meteor missed Earth. Though avoiding immediate destruction, humanity found that the meteor left behind something in its wake, something that would change the course of civilization forever: a new form of bacteria that ate through all known metals.
Facing this new era where all metals turn to ash, Jinkichi and his classmates will have to survive with little help from the Japanese government. Some of his classmates have already begun to understand that the norms of the past have collapsed, and lawlessness will be the new law. Jinkichi will have to protect himself as well as his classmates from the violence that ensues.

From Shoujo Crusade:

Kyouka, a sixteen-year-old, will be a winner today, the first day at the new school to which she has just transferred! She will definitely get a great boyfriend and say her goodbyes to those lonely days!! Kyouka has two brothers who love her a lot. Every guy who comes close to Kyouka is kicked out by them, thus she has no boyfriend. But she finally found an ideal prince... or that's what she thought. This guy, Maki, is actually a perverted prince!?

* Also includes two short stories in volume 2:

• Nanisama?! Oresama
Satomi loves Yuuya a little too much and is totally wrapped around his little finger. But, if this continues, instead of becoming his girlfriend, she'll forever remain his gofer. Will Satomi do something to find out exactly where she stands with Yuuya?

• Ijiwaru wa Kuchibiru
During Shiori's fifteenth spring, she fell in love with the idol Shuu Kitamura. She was even lucky enough to get to meet him in person, but she realizes he's nothing but a fraud! However, due to certain circumstances, Shiori becomes Shuu's personal assistant!?

In the casual days of the spring of his third year in middle school, Mitsuru Hibino meets transfer student Kouzou Issha, who develops his special power. Issha commands Hibino to use his lethal “power” to “correct the errors of this world”.
Their first step is to “kill those who drive while using their cell phones”. While getting their hands dirty with what society considers “crime”, these boys use their “power” for their “ideal justice”.

In the village of Hananoki, Taro lives alone since the death of his grandfather. One night, through his telescope, he accidentally sees a girl falling from a tall tree. But once at the place the accident happened, the only things he can find are the girl clothes. Back to his house, a mysterious creature try to hide itself. When he finally manages to catch it, what isn't his surprise to recognize the girl which now has only the size of a frog.

[Onigiri-Gakuen]
No one knows that 1st year Rena (16) and upperclassman Kyouta (18) are in fact married. This manga follows them in their lives to discover more about each other and keep the fact they are married a secret from everyone at school. They'll be tested in Jealousy, love confessions, exams, love, mother in laws, embarrassing situations, noisy neighbors and teachers.

From their worst encounter comes a story about their ultimate happiness! This romantic comedy explores the ups and downs of a serious relationship.

One day a guy's childhood friend randomly grows dog ears and a tail, but what can he do?

Issa Kinishi, a young man who worries and concerns himself too much over many different things, and spends his life being harmless and inoffensive.

One day he meets a beautiful, tanned enigmatic young woman. This young woman uses a smartphone with a cracked screen, goes into restaurants without caring about their online ratings, and makes curry without caring about the stains she gets on her clothes. She weighs on Issa's mind so much that he accidentally starts stalking her.

Enjou Shuuto's dream was always to become a detective and take down the scumbag who killed his father. As practice, he takes on the local bullies at every opportunity... only to get his butt handed to him. But what happens when rogue nanobots descend on his neighborhood, "enhancing" their hosts with deadly results? Brought to you by the tag-team of best-selling author Kurihara Showshow and Jump Rookie! award-winner Kaza Ana!

A deadly android was delivered to me on my birthday!.. 
This is a Manhwa by Songa Min. Set in the near future, follows the life of Nano, a classified Android.

After being held in disdain and having his life put in danger, an orphan from the Demonic Cult, Cheon Yeo-Woon, has an unexpected visit from his descendant from the future who inserts a nano machine into Cheon Yeo-Woon's body, which drastically changes Cheon Yeo-Woon's life after its activation. The story of Cheon Yeo-Woon's journey of bypassing the Demonic Cult and rising to become the best martial artist has just begun.

A pastry shop with filled delectable sweets on the hillside run by three brothers, Thyme, Sage, and Parsley. An otome's dream is it not? Well, hopes crushed.

Nanoha bakery is run by a lifeless genius baker, a motivated novice baker and shopkeeper, and a child. Facing rivalries, low sales, and debt, Sage tries to save the family bakery! Along the way, he meets some interesting characters.

From the creator of The World God Only Knows

Follows two boys with disabilities, Onishi Yuu and Ishida Kenji, as they deal with the trials and tribulations of high school life.

First confession in life. but to see the face only a moment after confession!? calm and deep love story is about to begin. - Nanoka's friends are only interested in boys, leaving Nanoka feeling alone and left out. The truth is, she had a boyfriend before, but was left so heartbroken by his lies that she's not interested in dating anymore. That's what she thought, until an overheard conversation moves her so much that she ends up suddenly confessing to a boy that she's never even seen!

A new idol on the rise, Souda Natsumi and her friend from highschool Iiyama Yukiya meet again at a music store. What lies at the end of this unwanted encounter?!