Two brothers, Shunpei and Kyouhei, have very opposite characters but share a crush on their cute sister Anko. The three of them live with their excentric father, may (or may not) have diffferent mothers, have fun, lots of tantrums and try to lead a happy life in junior high school.

From Omanga:

Eiji Otsuka and Sho-u Tajima at it again, Eiji in a much more minor role this time, however. In any case, this a relatively older and short comedy series (4 volumes) that should be a fun break from their usual mayhem with MPD (Multiple Personality/Dissociative Identity Disorder) .

In 1994, this manga was published as a whole under title "BROTHERS High School".

Kondo Masahito is a tough high school senior, while his older brother Yoshio is a calm and gentle kindergarten teacher, so it is not rare that younger brother protects the older one. Different personalities make it difficult for Masahito to understand his brother, but he still tries.

Chapters 5-9 are oneshots:
5) Ghost --Setagaya-ku no Maboroshi--
6) Amai Natsu no Kyousoukyoku
7) Unbalanced・Tart
8) Kimi wa Nemuru
9) DEAR / Ganbare! Kagaku-bu

The story of Ciguatera follows Ogino, who is bullied in high school along with his friend Takai. The two rely on their passion towards motorcycles and desire to get one to add some hope and vigor to their otherwise bleak lives. The two are learning to drive in secret at a driving school, and it is there that Ogino's life begins to change forever. The manga follows a variety of characters through their high school and working lives, through their struggles, their triumphs, their dreams, their futures, their love, life and loss.

As a child, Kawagoe Haruma eagerly awaited the birth of his little sister. However, his mother had a miscarriage, followed by an operation that left her barren. That Christmas, Haruma made his Christmas wish. It was a wish so innocent and heartfelt that it was accepted instantly, unbeknownst to him.

Many years later, on Christmas morning, college student Haruma is awoken by a woman riding a hovering motorcycle and claiming to be Santa Claus. She throws him a bag, and he opens it to find his new little sister!

Complaining to Santa Claus that he made this wish a long time ago, she tells him that it takes much longer for a sister than it does a toy car. After naming her Choko because of the Anchoko (mini-guidebook) she carries around, they begin their new life as brother and sister in a crazy apartment building filled with interesting neighbors.

1-2) Chikan Diary
Yuuto is a first year student at an exclusive private school for boys where everyone is a virgin except for the new transfer student Hachiouji. As part of the student news paper it's Yuuto's job to get all the dirty details or else spend the rest of his life as a virgin!

3) Journey of Lost Love
When his lover gets married heartbroken Atsushi decides to take a tropical vacation to relieve his stress. Nothing seems to be working until pushy tour guide Rubi decides to help Atsushi out. But the only thing Rubi seems interested in seeing is Atsushi's body!

4) The Perverted Daddy Long-Legs
Orphan Mizuki is suddenly pulled off his paper route and offered a high paying job taking care of a sick company President. Mizuki's new duties for entertaining the bed-ridden, surprisingly handsome young man aren't quite what he anticipated...

5) An Awkward Kiss
Morihira has issues moving on to the next level of intimacy with his lover Ueda because of a complex with his face, but Ueda mistakes it as Morihira not liking him. Will this pair ever move to the next level?!

6) I Won't Even Lose to Sailor Suits
Shintarou's teacher/boyfriend went to work at an all girls school and suddenly told Shintarou not to see him anymore. What is poor Shintarou to do?! Putting on a girl's uniform seems like a good start.

From Day of the River:

Since her parents are a little bit slow, Matsuda Erika (or Eri for short) has taught herself to be independent and extremely reliable. Moreover, she devotes herself to taking care of those around her—even if some of her classmates find her behaviour overbearing and annoying. One day, a strange new transfer student is introduced to her class. This boy speaks in choppy sentences, has little to no facial expressions, and goes by the name Nokina Kaname. Instantly, Eri feels compelled to take care of this martian-like new boy in her class.

This manga is a revised version of "Kimi to Hatsukoi", a one-shot found in Mako to Aki-chan no Koigokoro.

The oneshot "Kirai, Suki?" included at the end of the story has yet to be translated.

Tomoki, a young man with a thing for ecchi stuff, is used to living alone, with his dad traveling all the time. However, he is not prepared for the sudden arrival of his 9-year-old twin sisters, whom he never knew even existed! Toujou Minaho, the big-breasted girl next door, is ready to help out, but these cute little girls are quite a handful.... From Baka-Updates: Kamishiro Tomoki is an Otaku who is studying for college. One day, he received an outrageous "package" from his father: 9 year old blond girls who are his dad's illegitimate children from one of his business trips...... The twins, Selly and Riru are completely spoiled and drives Tomoki crazy. Not only that, the sisters have a "secret" plan to kick out Tomoki and claim the house just for themselves. Will Tomoki manage to make peace with the girls? Read and find out!

Corseltel, a sacred land where dragons and beastmen reside. Protected from the outside world by valleys and mountains, it's inhabitants, including Dragon Mages (ryujitsushi), live in harmony. The Dragon Mages are able to borrow and utilise the dragon's magics, but have to care for and look after the dragons as an exchange. Several years ago, the late wind Dragon Mage picked up a child floating down stream in a crate. Now, the child has grown into Corseltel's greatest dragon mage, able to utilise all 7 dragon's magics: fire, earth, wood, water, wind, light, and dark. More like a dragon baby sitter, caring after 7 baby dragons, these are the adventures they face.

From Lililicious:

A series of one-shots about four sisters, each focusing on a different sister.

The first is about a good girl who is tempted to break the rules.

In the second, two girls begin a pretend relationship with each other. But when one of them actually falls in love, will her heart be broken?

The third story is about a student council president who's always late for meetings.

In the forth story, a girl has been in love with a "witch" for as long as she can remember.

In the extra chapter, Midori (from chapter 2) worries that her girlfriend has fallen out of love with her.

Anise can't believe her luck when she finds herself in the same high school as famous former child star Siva. Although the cool and handsome Siva seems unapproachable, Anise manages to become his friend. But her happiness turns to surprise when she discovers Siva's secret: for years, he's been switching identities with his twin brother, Cipher!

From acme: Dame BL is "a collection of BL oneshots written by some of the lesser-known participants in the genre (and some you may be familiar with already), with a focus on less conventional settings and characters. We're very far away from high school here, which hopefully you'll agree makes a pleasant change of pace." 1. Be Here to Love Me (KUMOTA Haruko) The relationship of a foot-fetishist and his cunning colleague. 2. Kou no Kawa (MOROZUMI Sumitomo) Set in ancient times, a village is near starvation due to a bad harvest. For some reason, the young chief takes care of a cursed man he finds lying in the river... 3. Khaa Thoong (Est Em) Can the young Thai kick-boxer rekindle the thirst for competion in a senior boxer after his devastating defeat? Column 1 (AOYAMA Toomi) Useless Side Characters Column 2 (Kashima) Obsession/Favoritism Column 3 (KUSAMA Sakae) Terror! Kappa Lake 4. Natsu no Saigo ni Yosete (UMEMATSU Machie) Two elderly men reminisce about their lives together over a bowl of peaches. 5. Locas! (OKADAYA Tetuzoh) Jean-Luc fell in love through correspondence in a chat with Al. What will occur, when he will decide to meet off-line? Is it really Al that wrote to him in chat? 6. And Robo (CHIBA Ryouko) A touching tale of robot clones... or something. 7. Shinumade BL Shindemo BL (Takeuchi Sachiko) 8. Tonari wa Nani wo Suru Hito zo (UNO Jinia) The unusual love a man has for his fan in the hot summer. 9. Soldier (Zin) A nazi sadist and a prisoner in camp. Excitement, desire, but... what about love? Attachment? Column 4 (KEVIN Komine) Column 5 (COTORINO Deathco) Eronashi BL Column 6 (PSYCHE Delico) Column 7 (YONEDA Kou) 10. Muhou no Shounen (Mochimeko) A story involving a Reckless Young Man and some scary faced gangsters. 11. Ima Doushiteru (ROTTA Ikumi) The funny relationship between a man who has a fetish for soft/chubby things and his fatty otaku-friend. 12. It Must Be (MOMOYAMA Naoko) A story about two professional cyclists and their travails.

Seung Hun is a handsome playboy who's never experienced true love. Woo Sun is a charming playgirl who wants to be loved for herself and not her beauty.

Jong Yi is the beautiful, mysteriously childlike and vacant boy who becomes the object of their affections. A complex love triangle evolves between these three, further complicated by the involvement of Jong Yi's unfailingly devoted childhood friend and first love, a girl named Yu Ri.

They're all soon to discover that love is a long, painful path...especially if the object of it is completely oblivious to your attentions!

Note: As indicated by the genre tags, there are both shounen-ai and romance pairings in this story. It is not F/M romance only.

From Go! Comi:

When her grandmother passes away, high-school student Kajitsu Toda suddenly finds two hot stepbrothers and an adorable little stepsister dropped in her lap! Kajitsu and her step-siblings have only one thing in common: they were all abandoned by their parents. Against the odds, they've pulled together to form a family without grown-ups. They don't want charity, they don't want pity... they just want their dignity!

Things are particularly tough for Kajitsu and her step-brother Natsu. As kids, they were as close as any true siblings. Now, reunited for the first time in seven years, they've grown as far apart as two people can be. Can they ever become friends again? And can two high school students living together, even as "siblings" ever escape scandal?

Detroit Metal City is about a death metal band that has gained immense popularity in the indie scene.
The main character is a push-over, Negishi Souichi, who is trying to make a living in the music world, but he didn't imagine in his wildest dreams that it would be in such a band. Read and see what hilarious situations he gets himself into.

This is a story about two girls (Yuka & Maho) who dream of becoming famous mangaka. Each chapter tells a phase in their career, starting from their first audition in a manga writing competition, until they become professional mangaka.

From MangaProject:
Imagine what it is like to be raised by a gay father who insists that you call him "mom". The main character turns out to be a woman who doubts her sexual orientation, until she meets the right guy. She is so sure that he is "the one," that she goes out of her way to pursue him and then marries him lightning fast! Essentially, the rest of the story is about keeping the chemistry (a little twisted and crazy though).

From Attractive Fascinante:

Kusaka is an owner of a used-book store and is oblivious to the people around him. Iijima, on the other hand, is a hotheaded sales person. They were classmates during college and had some argument before, yet they became lovers now. When two total opposites personalities clash, the spark of love starts to disperse too…

Note: Chapters 7-9 were NOT included in the licensed volume.

Doujin Market. It is a place where individuals sell their self-published books. Each participant works daily to achieve their personal goals.

While their are some who obtain their dreams, there are also those who get pounded by reality. This is the story of those who live in the world of Doujin.

Izumi, a young art student goes to visit her old professor who is living out in the country. Izumi is trying to get away from something and wants to take a break at the professor's house for a while. When she stumbles on Sensei's secret sexual fetish, it sets off a tense relationship full of awkward moments and weird demands.

From Fantasyshrine:

Usami is a chef of an Italian restaurant called MIYA. One day, the whimsical owner decided to turn her restaurant into a "bishies restaurant"! Usami refuses to be part of this frivolous idea and will do anything to get out of it. Which led him to strike a deal with the owner. So now he’s stuck training Komiya, the spoiled, playboy son of the owner, to take over the business. But Komiya decided to make a deal of his own—!