Amongst the swans of England's Swan Lake, I am different. I am a black swan, and the last one able to transform into human form. One time as I peeked my head out from the lake, a ring was thrown in front of me. Because of this ring, I met she-male! Once I found out his true identity, I became his disciple, and somehow also his 100th girlfriend!

High-school girl, Kanzaki Mitsuki, just got a new older brother, when her mother remarries a man with a son. Soon after, her new step father gets transferred overseas and her mother follows him there, leaving Mitsuki alone with her new step brother, Yuuya. Feeling abandoned by her mother, she stays distant from Yuuya, never really getting along very well with him nor even keeping a conversation with him, until one day....

A story about an asocial man and woman.

From honyakusha:

When Takiya Kippei, the brother of two older sisters, realises that he desperately needs money to buy a birthday present for his lover, he decides to live and work onsite at a ryokan (a traditional Japanese inn). There, he meets the well-educated Honjou Masumi, a man who is neither too strict nor too lenient, and who has a charm which embodies the word ‘mature’. “This is the first time I’ve met someone like Honjou-san” - as Takiya continues working at the ryokan, he starts to become interested in Honjou…

After the end of the Vajra war in 2059 AD , a mysterious "Var Syndrome" suddenly appeared in various parts of the Galaxy, afflicting life forms, even gargantuan Unamushi (Eel bug) native to the planet Pipre. Result of research revealed that people who posses a special singing voice is expected to have the ability to calm the Var. Interplanetary Civilian Military Contractor: Xaos, chose the trio of female idol group "Thrones" - the candidate to start the demonstration test of the power of song: "Project Thrones". Valkyrie unit of the Xaos Pipre branch: "Echo squadron" will escort Thrones, and the novice pilot Kinjou Kaito will be ecstatic when escorting Pirika Polywanov. Kaito, knowing the sorrows and passion behind Pirika's unfriendliness, inspired him to "change" to the man who protects Pirika.

What did this middle school girl pick up on her way back from school?

The thing I picked up by chance... It was connected to my classmate's xxx?!

The school he entered is school full of yankees.
Then his life saver appeared before him when he's cowering in fear.

The "youth pure love" story begins when three students in their third and final year of high school meet during a time when they are worried about paths for their futures. Waiting for them are sweet, painful, and heartrending days.

Ninomiya is an Editor for a fashion magazine. Being a playboy he messes up with one girl to many and ends up compulsory transferred to manga editing department. In this man only den of otakus, he meets his new boss Oda. Oda drowns Ninomiya in work and refuses to acknowledge his professional skills. The arrogant attitude of the editor in chief clashes with Ninomiya's ambitious personality!

"I have my eyes on him, only him." Ming ZiQi's attention was drawn to Xiao Luo on his first day as a supervisor in practice. But as a simple murder case becomes something much more, it is time to seek out the truth?

From BL-League :

Through his friend’s introduction, friendly and cheerful Nishino became roommates with Maki, his kouhai in university. Living with the unsociable Maki, whose personality is the opposite of his, makes him feel troubled all the time. But after realizing Maki’s kindness and consideration, he gradually felt comfortable being with him. However, at that moment Maki told him “I like senpai, so I can’t stay with you anymore”. He can’t respond to his feelings but he wants to be with him. Nishino flatly rejected Maki’s confession by saying “It’s just your delusion” and continued living with him but... Cohabiting life between a cool kouhai and an airhead senpai! A newly drawn story included!

This is the adaptation of the award winning doujin novel that shocked Japan and sold over 130,000 copies within a month. It even outsold Haruki Murakami's long awaited novel, 'Killing Commendatore' domestically.

While in the manga, it claims that it's just a work of fiction, the press release for the book by Fushosha, the publishing company, says (and I quote) "'Otto no Chinpo ga Hairanai' is a shocking true tale that tells the story of a woman's life". It's about her relationship with school, society, men and women. It's about a woman that struggles with the curse that's 'normalcy', her struggle with impotence, cheating, and all that in between.

Comicalized by Gouto Yukiko (36-do, R-chuugakusei), a story of despair and hope, dedicated to all the people who have difficulty living, begins now.

Employee Kim Doyoon has been working for 5 years. He has one secret that he can't tell anyone else - the fact that he's a half-vampire born between a human and a vampire. One day, a single mistake turns his whole life upside down.

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.

Satou Fuuka is an orphan. Her aunt, who was her guardian, absconded in the night, leaving her with no money. Her parents wanted her to go to school, so she was looking for a job to cover her school expenses and rent (plus living expenses, though she didn't mention it). She goes to be interviewed for a part-time house helper job but is rejected before she can say anything, because the guy offering the job is the eldest for 4 brothers and it's an all-male household. She pours out her story, so he takes pity on her (even though he'd pointed out that she can't really take a part-time job if she doesn't have a guardian) and offers the job as a live-in position. However, he has one condition: she's supposed to disguise herself so his brothers don't take an interest in her. Her disguise: lots of towels around her body, so she looks fat; makeup so she looks old (39); plus her hair is all loose and she's wearing glasses.
The brothers are: Tsukasa (eldest, apparently already working); Akari (second son, first year college student with a wider strike zone for women than Tsukasa thought); Kairi (third son, genius high-schooler and Fuuka's classmate); Minato (youngest, first year middle-schooler who's a blue-eyed blond). Incidentally, Fuuka notices that none of the brothers look related.

Shize, who has been living a fugitive life in Japan, was summoned to another world. Finally found a place full of happiness she belongs to, she got married to the king and gave birth to an adorable baby girl. Suddenly the head Priest of the palace forced her to return to the earth?!
You’re kidding me, sorry but I’m not going back!

While running from the evil hands, Shize escaped from the palace but...? The reason for the Queen's Escape, Long Awaited Comicalize!

A life of a college student named Chihana along with his two animal companions: an aloof and dazzling cat called Neko-san and an energetic and friendly dog called Inu-kun.

Ukei Kaito fought a desperate struggle in order to fulfill his role as a summoned hero. He defeated the Demon Lord and saved the very world, only to meet an end filled but with betrayal. The companions that he’d trusted throughout his journey betrayed him and killed him by sticking a blade through his chest. It was then that he swore to himself. He swore that, if given another chance, he would no longer so rigidly cling to the concept of “faith.” He swore that, if given another chance, he would dedicate himself to enacting the most atrocious act of revenge possible. He swore that, if given another chance, he would do things right. 「I’ll kill every single last one of you… I swear it…」 And so, he died, leaving behind not but a series of menacing last words — but his story had yet to end. A voice resounded through his head and informed him that there was more to his fate than what lay beyond the grave. 【The following is a system message. Tutorial Mode has been terminated.】

Akashi, the strongest delinquent is feared as the "red ogre." The one he falls in love with is...?

From Tokyopop:

Kindaichi (frequently with best-bud, Miyuki) travels to various places where a murder has taken place, typically involving ghosts, curses, myths and folklore of significant events from the distant past, and solves the mystery using ingenious deductions of curious clues and his cool magic.

In 1995, this manga won the Kodansha Manga Award for shounen.