Onizaki Teppei is a high-school freshman who just wants to live a plain student life, but his world is rudely shaken by a mysterious girl, Mitogawa Enma, who declares her intent to find a husband at the school!

In a world called Barzel exists a particular profession called Private Military Firms or more commonly known as PMFs. They take on any particular job ranging from stealing to security as long as the price is right. Lynbell, Zephyr and Vashyron joined alliances to take on jobs and have been doing decently even in this highly competitive and cut throat industry. However, lately, there has been a mysterious figure who has always been one step ahead of them, taking their jobs and keeping them from making money. And now, it seems that person is their new client.

This manga appears to be related to the video game: Resonance of Fate.

Verde, a powerful and secret organization that controls the world, has a new leader. The only thing that stands in its way is an unlikely character, Kujou Shin, the king of pessimists. He has no attachments to anything or anyone and feels no hesitation to dying. He is unwillingly dragged into a fight for the most powerful position in the world, the leader of Verde. What will his fate be?

From Tokyopop:
Coud is a young sky pirate who discovered a girl with mysterious powers on what had seemed like a routine mission. Ren has the ability to lend Coud bizarre fighting capabilities (his arm turns into a giant blade of some sort), being part of a race of beings called Edel Reid, but being the possessor of a stone called the Elemental Gelade, she has powers even beyond the norm.

Melty Blood (????????, Meruti Buraddo?), is a visual novel and fighting game, co-developed by d?jin circles Type-Moon and French-Bread, originally released at Comiket on December 2002. It is shortened as simply Merubura (?????). Based on Type-Moon's visual novel game, Tsukihime, it later spawned an arcade version, titled Act Cadenza, that was developed by Ecole Software and has also been ported to the PlayStation 2. Act Cadenza is the first Type-Moon title to receive a PlayStation 2 port. A manga version by Takeru Kirishima has been serialized in Kadokawa Shoten's Comp Ace. [from wikipedia]

Fortune Arterial's story revolves around the male protagonist Kohei Hasekura, who transfers into a prestigious public school--an English style six-year school, serving junior high and high school students. The school, named Shuchikan Academy, is on an island, Tamatsu Island, off-shore from mainland Japan, and the only way to get there is by boat. This is a series of characters' introductions to prelude the main story.

From AQUA Scans:

"Flowernoid", dolls created with the special nature of flowers, and who devotes themselves to a master. This is the story of Satsuki, a master flowernoid repair specialist whose daily life changes by happening upon a lovely flowernoid. "From now on, I belong to you" the flowernoid claims.

Ouka is the great empire that rules over 1/3 of the world. To prevent conflicts from the other countries, they hold the battle competition once in every 8 years. In this competition, 5 candidates, known as "Patriots", from each countries are to battle against each other and the winners will be granted with fame and honor. This story follows Kurou, the boy who walks the same footsteps as his father to become the strongest patriot, along with his team . . .

Teased unmercifully for his past as an orphan and a slave, Teito has only his best friend Mikage to ease his days at the elite Barsburg Academy - and his mastery of the magical art of Zaiphon! But even that will not be enough to save him when he discovers a horrifying secret behind the ruling Empire. Trapped in an ancient battle between a wicked Death God and the Seven Ghosts and guided by three mysterious priests, Teito discovers a power that could save the world... and shed light on his own mysterious past.

From Wingtip Cafe:

Udagawa Kachiko is a studious no-nonsense high-school girl. One day, she found an entrance to a fantastic world called Fusuma Land.

From Viz:
Miaka Yuuki is an ordinary junior-high student who is suddenly whisked away into the world of a book, "The Universe of th Four Gods". There she becomes the priestess of the god Suzaku, and is charged with finding all seven of her Celestial-Warrior protectors.

A Japanese student named Arisu gets on the wrong bus and winds up in some sort of homoerotic version of Lewis Carroll's Wonderland. The last thing you want to do in a land where people change shapes at the drop of a hat is to drop the soap and introduce yourself as Arisu (identical in Japanese to Alice), lest you start looking like one! And Arisu does, slowly but surely...

A fantasy story for kids featuring a girl named Melmo, who can change her age as she wishes by eating special candies.

Melmo's mother dies in a traffic accident, leaving young Melmo and her younger brother Totoo. Anxious, Melmo's mother in heaven asks God to prepare some magical candies, and hands them to Melmo.
There are two kinds: Melmo can grow 10 years older to become any sort of adult she wishes by eating a blue candy. By eating a red one, she can become 10 years younger.

Using these miracle candies, Melmo disguises herself as a nurse, schoolteacher, policewoman, and overcomes troubles together with her brother, Totoo.

While testing his 8 mm camera at night in his small town, Kaito Kirishima is caught in a mysterious explosion. Strangely, Kaito wakes up the next day perfectly fine, but with no recollection of what exactly happened the day before. Unfazed by what seems to have been just a dream, he heads to school not giving much thought to the incident. Discussing his camera with his friends, they decide to make a movie during summer break. They invite two upperclassmen to participate in the project: the recently arrived Ichika Takatsuki and the odd Remon Yamano. In a strange twist of fate, Ichika starts living with Kaito because his sister has to work overseas. Summer days are about to get exciting for the small film crew.

From Ivyscan:

Karin and Lisette are witches who trained together when they were younger. After a long absence, Lisette has moved to a nearby forest and seems to be stealing Karin’s customers. Karin really wants to see her old friend again, but she can’t seem to get past Lisette’s apprentice, a young man named Ruin…

Volume 1 Oneshot: Meeting Place
About a student that can't say thanks to her overly enthusiastic teacher; so, she is thrown back in time to figure out that she still can.

Volume 2 Oneshot: Mission Sachiyama
About an after school program that trains modern day ninjas.

From Fate:

Niina went back to the past and landed in 'Hakkenden's (eight dog warriors) world. There, she met Satomi clan's young master, Satomi Takemasa. According to him, Niina's the reincarnation of one of the Hakkenshi. In order to beat their worst enemy, Tamazusa, they need Niina's power?

Loner high school student Moribe Kyouya thought he was lucky to have the beautiful and mysterious new transfer student Baroque talk to him. The next thing he knows, he receives a love letter calling him to the roof, but the confession isn't exactly what he expected...

Kuini and Yilou must travel to Tyzzer, an unknown village, to prevent a nameless threat, or the world will end in 80 days. Along the way, they team up with the apprentice artist Lang, who is also traveling to Tyzzer to find the mythical dragons. The way to Tyzzer is filled with danger, mystery, mischief, and… fatal hilarity.

Will they ever get to their destination?

One day a tanuki named Monoko stumbles across a baby abandoned by its mother. Having no family of her own, she raises the baby to the best of her ability even though they originate from different species. Hardships and enemies face the tanuki but that doesn't stop Monoko protecting the baby at all costs. Many trials await this baby as it grows and communicates with the animal world.

Won the Kodansha Manga Award for Children's Manga in 2013.

Yona Ryouma, a normal high school boy, saves a man from another world at the cost of his own life when a mysterious earthquake occurs. The man, Emillio, uses a potion which apparently saves Ryouma's life. However, he is also changed into a girl in the process.

Emillio is actually the prince of this alternate world and he declares Ryouma as his wife, presumably on the context of saving his life. But what about Ryouma's life as a high school boy in his own world? And will he come to accept being the prince's wife?