Ooshima's best friend and girlfriend says they love each other. He should be angry, but all he thought was that he was interfering into their relationship. Kurosaki is the boy that befriends him and might also be the person to help mend Ooshima's heart.

Tomoe Tatsumi is a freshman attending university in Tokyo. Life couldn't be better: he's living in a really nice apartment for less than most people pay for a single room. This is all thanks to Mitsugu Kurokawa: salaryman, landlord, and (hopeful) lover.

It is due to Kurokawa's generosity that Tatsumi is able to live in Tokyo on such a tight budget. Kurokawa's intention is clear: to love, honor, and cherish Tatsumi until his dying days! And if big brother Souichi Tatsumi has his way - that day will come sooner than not!

For Kurokawa, progress can only be made by "challenging the impossible...." And thus, Takanaga sensei introduces us to her charming romantic comedy, Challengers!

- DramaQueen

The main couple from Koisuru Boukun also have a few short chapters through out the manga that take place before Koisuru Boukun starts.

A collection of oneshots:

Her Carriage
Everyday Kouta comes to pick up Aya on his bike. Aya loves Kouta, but Kouta is looking for a girl friend. Will Aya ever tell Kouta how he feels?

Make-Believe Brothers
Art student Yuuta and Tomo are neighbours and childhood friends. But is that all they are?

After-School Strawberry Flavor
Everyday Tsuduru finds candy in his school desk; probably left there by a night school student. He starts to exchange letters with the unknown giver; but will they ever meet?

Finger
Although Akio, who has a hand fetish and confesses his love for Hayato, Hayato refuses to accept
the fact that he loves Akio as well, until Akio decided to leave to study abroad?! Will Hayato come to face his true feelings?

Four Leaf Clover
Yoshida unconsciously began noticing Yukimoto, a boy with weak health who always sits PE out. When Yoshida starts finding four leaf clovers in the class diary, he asks Yuki if it was him...

Cello Mellow
An attractive cellist by the name of Mahoro is a hopeless man who can't recognize love. Mahoro, who has never loved anyone before, was picked up by Sousuke on a rainy day one year ago. Woken every morning by Sousuke, the sleepy Mahoro finds himself drawn to Sousuke's smile.

Contains 3 stories.

Story 1 (Chapters 1 - 3) - Ciao, My Darling - Shishimoto who makes his living as a computer wizard picks up down-on-his-luck Tomosaka and his cat Hana off the street. Shishimoto seems to really have it all together, while Tomosaka can't even hold down a job for any length of time -- but not all is well behind Shishimoto's gruff facade, and over time Tomosaka finds out what's wrong, and comes to care. But then he causes Shishimoto to lose a lot of work by turning the computer off at an inopportune time to save electricity. Shishimoto has to call in his female friend Mika to help, which pushes Tomosaka into confessing his love for Shishimoto. But Shishimoto doesn't react well to his confession...

Combination is a police story about two very different men becoming partners to fight crimes in high places. Their combination turns out to be one-of-a-kind.

The story is based on the adventures of a pair of policemen, Hashiba Shigemi 26 years old and Keiichi Sasaki, 22. The two handsome young men are somewhat nonconformist and often act of impulse; especially the impetious Hashiba. They solve crimes with "less-than-orthodox" methods and push themselves to the limits of the legality; Often engaging themselves more on hunches and "faith" than for the same law; but after all they are the best "Combination" that can be found. thus the title of the series. They prefere to take action against the politically corrupt and the dealings of the yakuza. The Japanese Robin Hood?

A romantic story set in showbusiness and modeling world, CRASH reveals the influence played and the links joining the publicity, cinema and TV worlds: as a vector to the image manipulation, that tends too often to dehumanize the top model or actor, reducing him to a simple image in 2-dimension.

From Viz: Delve into the tortured past of Earl Cain C. Hargreaves, charismatic heir to a wealthy family full of secrets, lies and unthinkable crimes. The prequel to the Godchild series, The Cain Saga follows the young Cain as he attempts to unravel the secrets of his birth, all the while solving each new mystery that comes his way.

1st story - Concrete Garden
Angels exist and Kashii Kiyoharu, grandson of the man who "created" the angel, has been hired to befriend him. His name is Toki. Kashii soon finds out why the scientists need him around. Toki is lonely, but no one wants to get near him unless it's necessary since he eats human flesh. What has Kashii gotten himself into?

2nd story - Clock Down
Everyone expects Tokiwo to go to a good university. However Tokiwo doesn't want to in order to "play it safe". One night there was suddenly an earthquake. The stone he was looking at started to glow and out of his floor comes someone who looks exactly like his childhood friend Jiu. Well there is a difference. This "Jiu" is dressed for combat and has a very large weapon. Just what does the stone have to do with "Jiu" and who gave Tokiwo the stone?

Carl van Hellsing has vowed to hunt down the vampire Elliot for eternity. But, that's exactly what Elliot wants. Implicit shounen-ai.

From Bliss:
In this universe, there are four worlds: Meikai, the center of the universe, Ninkai, the human world, Youkai, where monsters with shape-shifting forms live, and Shintenkai, the world of the Celestials. Shiba Yukinari is one of the few who are born of both Youkai and Celestial blood - during the day, he works as a detective, but also has the job of exterminating youkai. As he works collecting 'cores', or a youkai's source of power, he meets Riifei who that demands that Yukinari hand over his own 'core'...

Vol.1 Crimson
Vol.2 Crimson Crown
Vol.3 Crimson Chaos

Tsubasa has always been a little weird and detached, but when he gets dragged into a different world to rescue his supposedly lost mother, his brother Tokimaru knows that there is something more to his background. There they meet up with a mysterious character Shroud, captain of a pirate's ship, and he becomes an aid in their adventures. This is a very mild shounen ai series, but the story is very strong with lots of action, and all the characters are very memorable.

From BLU comes an unearthly collection of stories illuminating the complex lives of immortal beings. An angel, who loses his place in Eden, finds a mysterious and dangerous new patron. A poor painter finishes a woman's portrait without a subject and reveals his forgotten past. These stories and more will delight fans of beautiful angels and demon boys!

From GOoC:
Data is a kind of Magical Boy series manga by Tachibana Kaimu. The two main characters, Sakura and Yuki, are on quests to gather stones with magical powers. In doing so they are also hoping to uncover the mystery as to why they both seem to have lost their memory. A lot of new characters who are also "hosts" for the stones join in the fun as the story progresses.

Deep Black (a superhero reminiscent of Batman) sets out to solve the mystery of the Glory of the Seven Sages paintings. Mystery shrouds the situation and the characters as Deep Black encounters car chases, burglary cases, bomb threats, and meets Ghost, the handsome thief who escapes and slips away from DB.

[From DMP]: Toru is a shy and quiet student who has developed a special crush on his close friend Ryoji, the most popular member of the high school swim team. In front of Ryoji, Toru hides his feelings and acts as if he is just one of Ryoji's good friends, but in a moment out of the blue his world will be turned upside down as Ryoji will confess a secret desire for Toru. Dazzled, Toru can barely hide his excitement for Ryoji and quickly accepts his offer. As time passes, Toru's happiness begins to fade knowing that his affair with Ryoji was just a fling based out of Ryoji's sexual curiosity. Toru, adamant about his feelings for Ryoji, confides in another one of his close friend, Kashiwazaki, about his dilemma. The two set off to devise a plan to test Ryoji's true intentions by faking a romantic relationship. Soon after, a frustrated and jealous Ryoji attempts to pry Toru out of the arms of Kashiwazaki. Is it just as they planned? Yeah! That is of course until Toru realizes Kashiwazaki wasn't really faking! How could he not have seen it coming? Both Toru and Ryoji have hidden their feelings from each other in the past, but now they have discovered that they were not the only ones. Will Toru and Ryoji be reunited or will their true feelings for each other go unfulfilled?

Shingo and Kippei are making out in a secret place at school. Not secret enough, however, because the people who run the student council find them there. Homosexual behaviour is strictly frowned upon, and leads to physical punishment. (No, not the kind you're thinking, unfortunately.) The leader Sawatou, nicknamed "Doberman", tall, dark, handsome, and with a cape, impresses Kippei so much that he instantly falls in love. But with Sawatou despising homosexuals, surely that love is doomed to failure?

Yamamuro Yuuki is a talented star who has caught the eyes of many people. He's been toying with a young and seemingly innocent actor named Sawaki Mitsuru, who stars opposite him in a drama. To make matters worse, Ootaki, the producer of "Casual Lover", is also after Sawaki. The curtains have lifted on the game of love between these proud men!

1) Honey Pie Debut
Two good friends know they have loved each other and become a couple. But being tired from accommodating one to another, they return to being good friends again...

2) Melody Melody
Two students who enjoy singing in the street: one student, a lyric writer, suffers from one-way love; the other student, a composer, comforts him and asks him to love him instead.

3) Kirei Kirei
Our hero has longed for dormitory life, but his very beautiful roommate can't clean up his room...

4) Water Drop Sacramento
A mysterious student is rumored to have killed and buried a woman under a cherry tree. But our hero finds out he buries the hero's favorite things which he wrote about on graduation...

5) Dizzy Boys Fruits Milk
A students love triangle around the son of a public bathhouse owner.

6) Donut Letter
Watching video, two boys feel sexual desire. On the next day, one student puts the blame on another and makes him misunderstand.

From Blu:
It's present day, and Archangel Michael is fed up with the pathetic development of the human species. The angels, in their world high above ours, have been given the choice between destroying or preserving humanity. This will be decided by having "Plus Checkers" looking for good points and "Minus Checkers" looking for bad points, and whichever finds 10,000 points first decides the outcome. Chihaya and Kagetsuya are angels who have known each other since their days at military school in Eden, and having taken up opposing sides of this "good vs. bad points" checking system, are teamed together during their stay on Earth.

However, Chihaya is unusual even by angelic standards—he has black hair, eyes and wings. He's one-of-a-kind, unusually powerful in spite of his naive demeanor (much to Kagetsuya's dismay), but set apart from his angel kin...until the Black Cancer strikes the heavenly population, darkening the wings and hair of its victims before spiraling them down into painful death. Tension builds among the angels and between Chihaya and Kagetsuya in particular, and it looks as if the secrets to the salvation or destruction of both Earth and Eden may lie with Chihaya himself.

Note: The English print version is of the Japanese Deluxe rerelease, contained in only four volumes and also having some bonus materials.

Because of changes in seating arrangements, high school student Tsuda ended up behind the quiet and expressionless Endou. Their interaction is born from a trivial incident, and he begins to see Endou who he has never gotten to know before. That mole, slender nape, and soft hair. The subtle faces that he makes and little changes in his attitude. But Tsuda, who used to be indifferent about others and never made any deep connections, now feels impatient about the distance between him and Endou, who he has been gradually getting closer to. What on earth is drawing these feelings?