After 3662 blind dates, the 160-years-old Headless King of whom everyone is afraid is finally getting married! But the King keeps hiding from the cute and gentle Princess instead of meeting her face to neck. So how can the Headless King and the Princess get to know each other?

Kokuryuu Kaguya was only a little boy when he witnessed his father murdered by demons. He spent years trying to convince people about what he witnessed, but was dismissed as a traumatized child with an over-active imagination. Now a teenager, Kaguya still remembers what happened.

One day, Kaguya is struck by a mysterious light and meets a young girl named Mao—a skillful warrior wearing bunny ears—who rescues him from a demons' attack, then demands to know what planet he's from! Kaguya finds himself inducted into a secret organization of other-worldly individuals whose goal is to defend Earth from monstrous invaders. Reborn as a Battle Rabbit, strange powers awaken within Kaguya which allow him to fight these creatures and seek vengeance for his father's death.

From Transcendence:

On a hill overlooking the sea, in a town that retains its old-world beauty, a new and gentle love story begins!

In order to find the treasure which will recover her memory, a girl sets out on an adventure.

Series was discontinued in 2014 after Nanaki started working on her new weekly series, the popular Helck.

In the immediate future, a giant meteorite has collided with earth. All living organisms, including mankind, have been wiped off the face of the planet. The government, who had foreseen this outcome, took measures to counter the worst-case scenario. In particular was Project "7 SEEDS", in which five sets of seven gifted young men and women were carefully selected and placed into teams (Spring, Summer A, Summer B, Autumn and Winter). Each participant was then put under cryogenic sleep in hopes of preserving the continued existence of mankind.
When those men and women awoke, they found themselves suddenly thrust into a cruel world. While bereft and grieved over forever losing their loved ones, they sought to find ways to survive.

Note: Won the 2007 Shogakukan Manga Award for shoujo manga.

From Bunny's Scanlations and Must Be Endless:

Top student Mizusawa, third year in high school, was kissed by his drunk homeroom teacher, Takatsu (37 years old). After being told by a dazed Takatsu, that he'll stop the unrequited love he's been holding for him ever since his school entrance, Mizusawa has for the first time taken an interest in him. A few days later, ever since his secret was known, Takatsu has been scared of Mizusawa getting close to him and each time Mizusawa would shudder with excitement. However, one day after learning that Takatsu has gone to a marriage interview, suddenly Mizusawa realized that he wants the older man. Also features the adult love between a mail carrier doggy type and an ill-tempered novelist.

Volume 1 : Young Bad Education
Volume 2 : Young Good Boyfriend

A collection of short stories:

• Boketsu

• Taikutsu na Tsuki

• Johnny kara no Dengon

• Round Girl

• Nade-shiko

• Chinpa

• Jinsei Kaya no Soto (Kari)

"The corner suits me. Or that is how it should be..."

Sumire, a very low self-esteemed, gloomy girl had accidentally stained a school idol's shirt. He demands to pay him back by a date?

When the Majin awoke from the depths of darkness, the deity of fate chose six heroes and bequeathed them with the power to save the world. Adoretto, a boy who proclaims himself the strongest on Earth, was selected among the Rokka no Yūsha (Heroes of the Six Flowers), and he goes to the rendezvous point — but seven have gathered there. The heroes suspect that someone among the seven is the enemy, and the initial suspicion falls on Adoretto.

A Kiss Note is a powerful notebook that makes anyone who has their name written together will instantly fall in love if they kiss each other regardless of any circumstances. This magical and very familiar item belongs to an angel named Guri whose job as cupid is to create couples. However, she accidentally writes down Aino Seiji, a regular high school student, and unless he kisses someone, Guri will die. She convinces Seiji to go kiss his crush, Hiyama Akane, the school's popular girl who turns out has even stronger feelings for him, bordering on obsessive and psychotic. Eventually Akane and Seiji come together but not before Guri decides that she likes Seiji as well. What seems awesome to most guys becomes hell for Seiji who just wants a normal relationship with girls.

In a fantasy world, fighter Tatsumi sets out for the Capital to earn money for his starving village, and finds a world of unimaginable corruption, all spreading from the depraved Prime Minister who controls the child Emperor's ear. After nearly becoming a victim of this corruption himself, Tatsumi is recruited by Night Raid, a group of assassins dedicated to eliminating the corruption plaguing the Capitol by mercilessly killing those responsible.

Shinozaki Mikoto is a student whose life is really routine. Going to school, going home, going to school, going home... nothing changes... until the day the girl he likes talks to him and introduces him to cycling. His life now has a new meaning, and a bright path has shown itself to Shinozaki. Experiencing both failure and success throughout his training, he works hard to become the best cyclist in the world.

22-year-old Yashiro Mai was an average office worker until the day a video game console arrived in her mailbox and she was forced into playing a game known as “Nightmare.” If you refuse to participate, those dear to you will die; if you lose battles in-game, parts of your body cease functioning as penalty.

The horror of Nightmare spreads through society in a flash. To combat it, Mai’s company creates a Nightmare Strategy Team, and she's one of the members.

In addition to "Love/Death", about a couple who clash over the limits of their feelings, Kuzushiro's latest volume also includes “Nicochuu”—the story of a delinquent with straight A’s and her admired sempai with a good bit of bark but only gentle bites.

From September Scanlations;

Here starts the Konya spinoff series, focusing more on Gorou and Verde! There’s plenty of Endou and Rikiya as well, but this story will spend more time telling the story of these heretofore side characters. The story takes place immediately after the last Konya chapter, so you can think of this as Chapter 20, just less focus on Endo/Rikiya and more on Gorou/Verde.

From Fujoshi Bitches:

One day, Yajima, who kept on having physical relations only with older partners, met a young man, Watabe. Younger guys were never his type but the hot sex he had with that man made that night unforgettable. What will happen to Yajima, who since then keeps on wanting to have flared up sex with Watabe again...?

Young-un is a beautiful girl who dates and dumps guys easily, and Yeon-ho is a strange boy with a dark past who makes her feel something different...Contains mature themes

In the near future, a Japanese scientist engineers a powered exoskeleton called "Infinite Stratos" (IS). Possessing technology and combat capabilities far more advanced than any other weapon system, the IS threatens to destabilize the world. Faced with such an overpowering weapon, the nations of the world enact the "Alaska Treaty", which states that IS will never be used for military combat and that existing IS technology must be equally distributed to all nations, to prevent any one nation for dominating the others. The introduction of the IS does however have a major effect on society. As IS can only be operated by women, the power balance between men and women is broken, with women coming to dominate society over men.

Ten years after the first IS were introduced, the world has entered a new age of peace. The peace is shattered, however, by an unexpected discovery. A 15 year old Japanese boy, named Ichika Orimura, is discovered to be capable of operating an IS. Realizing the potential, Ichika is forced by the Japanese government to attend the prestigious Infinite Stratos Academy, an international academy where IS pilots from all over the world are trained. Thus his busy school life surrounded by girls begins.

A comedy using perverted themes. Mainly between brother and sister.

Ruka, who never had a boyfriend in 17 years due to her shyness, keeps dreaming of a silver knight calling her name. One day, she hears a rumor about a stone that can make its owner have sweet dreams while sleeping. Followed by a strange event, Ruka tries the stone and is brought into the dream. However, what she finds in that dream isn't something that she had expected. She wakes up neither in her bed nor in her own world, but in a world where Valkyries rule.