Nanako lost her parents at a young age--she never knew her father, and her mother died right after she entered middle school. Since then, she has lived in a temple with other orphan kids. But Nanako always had the assistance of her father's old friend Seitou. One day, Seitou transfers Nanako to a luxurious school in Tokyo. There, a boy named Subaru kisses her, and it turns out that he is actually her fiancée.

Ikezawa Sumire's three elder brothers, Asagi, Ai, Kon are so beautiful even friends get jealous! Sumire too loves Asagi and Ai, but for some reason she just can't like Kon. That reason is...!?

Adoptive siblings love.

From Nagareboshi Manga:

Kogane's grandmother, who she's lived with all her life, has just passed away. With no place to go, she's sent to live with a family friend - a woman who has three sons. It turns out that Kogane is to pick one of those sons to become engaged to?!

Marumie is a nickname for Maruyama Mie who transferred from her local media announcer job to variety entertainment business. Her dream is to become an actress, but right now she's in the midst of comedy job. The real reason for her transfer was to meet her one-sided love for the super popular comedian Kanadagawa-san...!?

Mana is an ordinary high-school student who somehow travels through time to the Sengoku Jidai (the Warring States Period) and encounters Uesugi Masatora, one of the generals. He decides to protect her, while his rival Takeda Shingen targets her. With Mana knowing the outcome of this war, will she change the future?

From Viz:

Shurei Hong, destitute but of noble birth, has always dreamed of working as a civil servant in the imperial court of Saiunkoku, but women are barred from holding office. The emperor Ryuki, however, refuses to take command, leaving everything to his advisors. Shurei is asked to become a consort to the emperor to persuade the ne’er-do-well ruler to govern.

Shurei enters the palace as Ryuki’s consort, but he has yet to seek her out. It is rumored that men, not women, share the emperor’s bedchamber. Shurei must think of a way to stop the emperor from shirking his responsibilities, but she has to find him first!

From DrMaster:

All he ever hoped for was to be one step closer to becoming a priest, but Masato Kamioda gets more than he bargained for when he suddenly finds himself as the only male student in a pilot program at an all-girls divinity school.

From Yen Press:

Welcome to the prestigious Saint Leaf School, where, among other things, the boys are so pretty they give the girls a run for their money! Amidst this bed of flowers exists one Hitomi Sakuragawa, a sweet girl with a not-so-little weight problem, who lives in a nearby apartment owned by her doting older brother. Hitomi also happens to have pretty much the best luck on the planet: Her neighbors are some of the hottest guys in school! But will she need to steel her willpower, cut out the cookies, and slim down before they’ll even give her the time of day? Or will they be charmed by her kindhearted, genuine personality? It won’t be long before Hitomi discovers that the road to a healthy lifestyle is paved with hilarity!

Tachibana Ritsuka is a female second-year high school student who attends Shiko Academy in Shiko Town. She enjoys her school life while living with her mother Maria, but one day, that balance falls into ruin when she discovers several of her attractive male classmate are demons.

Teppei Arima is a second-year high school student who lost both of his parents in a traffic accident on their way home from a family trip. His grandfather, Isshin Arima, happens to wield the puppet strings in Japan’s vast economy and demands that Teppei becomes his successor as the head of the Arima Group. To prepare for his debut into high society, Teppei enrolls in an elite academy for the scions of the rich and powerful.

First Kurumatani Haruko Long series (no more a simple oneshot)!!! By Alessia-chan: Ruki is an otaku and is in love with a character of manga called Shun-sama! Suddenly she meet a guy that will live in her house due to her mother sudden travelling and that looks exactly the same as Shun-sama! But does this guy is really a prince-like such as Ruki expect?

We follow the bumpy and funny romance between bubbly Tamoko and the serious Kanji. With Kanji's father running an idol agency, and Tamoko being the daughter of their top-selling idol, Shinju, things get complicated. Tamako must hide the fact she is Shinju's daughter to save public face, and at the same time, she is determined to be Kanji's ideal wife (as was promised when they were little kids). It doesn't help that Tamako's pretty clumsy and poor of domestic chores, but no matter what comes down the road, she's not about to give up!

From Viz: What happens when an all-girls' high school reigning tomboy finds out her school is about to be filled with boys!? Hanabi Oozora is a rambunctious sixteen-year-old tomboy who comes to the rescue of her less assertive friends--sometimes in exchange for food. So what does she do when, all of a sudden, her all-girls' school is about to be integrated with an all-boys' school?! She meets and falls in love--naturally--with one of the three most popular and handsome boys in the Student Council, Yasuaki Garaku! Unfortunately, Yasuaki doesn't care for girls... and when the girls' Student Council clashes head-on with the boys' Student Council, Hanabi steps in to become a member - hoping she'll change Yasuaki's mind!

A new teacher finds himself a newly appointed position as a teacher at an all girls school... on an island... in the sky! How will he make do in his new surroundings? Or the residents of this island who seem like they came from another world? And what's more, how will he fare at being a teacher?

From Turtle Paradise:

It's not that she tries to keep to herself, exactly: It's just that everyone seems to look right through her! Naturally, Sakuya Tohno has a complex about it. She says she's just like air: ever present, but never seen. All she wants is a friend, but building relationships isn't exactly easy for someone who is, for all intents and purposes, invisible. But then she hears a legend about the "Thousand-Year Sakura" and how, if one makes a wish beneath its perpetually-blossoming boughs, it's sure to come true. So in a moment of desperation, she races to the tree, only to find four very attractive boys waiting for her... And at that moment, beneath the cherry blossoms of the ever-blooming Thousand-Year Sakura, something incredible happens!

A young man finds and returns a lost wallet and cell phone to a beautiful young lady, thus begins the destined relationship between two strangers. Sound typical? Well then, how about making the young lady the young man’s future homeroom teacher, and give them both a twisted sense of right and wrong. And just for kicks, let’s have the young man help himself to a self proclaimed reward from the lost wallet before returning it… but of course, this scenario wouldn’t be complete unless the young lady was very unforgiving when it came to teaching one of her students a lesson on morals. (Source: Infinity Studios)

It's the year 2269, and April Enus is working as a spy for the Alliance. She's known as "Venus" because of her special power: fatalities don't seem to happen when she's around. But is this power a blessing or a curse?

Takenori is a major fan of Dating Sims. One day, he receives a strange E-mail that tells him he can be the main character and asks him to insert the source material for his new world.

Takenori inserts his favorite Dating Sim "Eternal Innocence" and after strange things he mistakens for a dream, wakes up - to find that all the heroines from Eternal Innocence have come to life in his usual surroundings!

From Del Rey:

Hana Suzuki loves only two things in life: eating and sleeping. So when her handsome classmate Izumi Oda talks her into joining the school hockey club, how is she going to survive getting up early, working hard, and playing well with others? True, the Grand Hockey Club is full of boys - super-cute boys at that - so maybe it won't be so bad after all…

From VIZ:
In company-owned rabbit-hutch apartments live tenants who can't afford to live anywhere else, and the apartment complex in which high-school girl Hatsumi Narita lives is ruled over by the rumor mongering, self-righteous Mrs. Tachibana. Get on Tachibana's bad side, and life becomes hell. When Hatsumi has to buy a pregnancy test because her popular sister Akane's period is late, Mrs. Tachibana's son, Ryoki, who used to bully Hatsumi as a kid, promises not to tell the world about Hatsumi's secret, only if she becomes his slave. Suddenly, Azusa Hatsumi's protector in their youth, reappears to save her again! He's moving back into the neighborhood! Despite the budding romance between Hatsumi and Azusa, Ryoki has control over her through the secret that could ruin the lives of everyone in Hatsumi's family, and he hasn't forgotten who his slave is.