Nanase Haruka is a sixth-grade elementary school student who loves connecting with the water and feeling the water as he swims, and he attends a local swim club together with his childhood best friend Tachibana Makoto and Hazuki Nagisa, one year younger than the both of them. Then, one winter’s day as graduation draws near, Matsuoka Rin transfers into Haruka and the others’ school from another swim club. Through swimming, Haruka strengthens his bonds with Makoto and Nagisa, as well as with Rin–at which point Rin, with his passion for the medley relay, suggests they form a team together and enter a tournament.

This is the novel that the anime Free! is based on in manga form at last! (September Scans)

15-year-old country girl, Suzume Yosano, has to move to Tokyo to live with her uncle due to her father's transfer. She bumps into a mysterious man who ends up taking her to her uncle's place after she gets lost. Turns out, Suzume will be seeing him a lot more often once she starts school because... he's her homeroom teacher!?

Included in the manga is a oneshot story called Tsuyu Kaoru (A Love Story in Moist Rainy Days) in volume six:
A romantic and melancholic love story behind a red umbrella.

Kenji Sakuragi is a poor lawyer and ex-motorcycle gang member looking for an opportunity to boost his career. His chance finally comes with the nearly bankrupt and notorious Ryuuzan High School, referred to as "baka gakkou" (stupid school) by some. There, he sets up a special class that aims to prepare students to take and pass the entrance exam of Toudai.

Won the Kodansha Manga Award for General Manga in 2005.

A long-running Japanese web-manga hosted by Neetsha, by Muu-Muu.

Shinta likes to play with cats even though he cannot have one for a pet because of his father's allergies. Cats also like to play with Shinta... in more ways than one... including becoming Shinta's girlfriend and generally trying to get him to reciprocate their catcalls, literally.

In the Mizu Wakusei Nendaiki (Aqua Planet Chronicle) series:
1. Mizu Wakusei Nendaiki (Aqua Planet Chronicle)
2. Zoku Mizu Wakusei Nendaiki (Aqua Planet Chronicle After)
3. Kan Mizu Wakusei Nendaiki (Aqua Planet Chronicle Around)
4. Midori Mizu Wakusei Nendaiki (Aqua Planet Chronicle Jade)
5. Ao Mizu Wakusei Nendaiki (Aqua Planet Chronicle Blue)
6. Mizu Wakusei Nendaiki Getsujou (Runyan) (Aqua Planet Chronicle Final)
7. Mizu Wakusei Nendaiki Gekkan Sachisachi (Aqua Planet Chronicle Monthly Sachisachi)

Other contributer: C2 Agency

Genshiken follows the lives of a group of college students drawn together by their shared hobbies, and the trials and adventures associated with being otaku.

Genshiken Nidaime ("Second Generation") is a continuation of the previous series, with chapter numbering starting at 56. In the Japanese edition, the first volume of Nidaime is numbered Volume 10, to continue from the end of the 9-volume Genshiken series. The US edition renumbers the volumes so that the "Second Season" starts with Volume 1.

Asahi's never been in love, so doesn't know what it feels like. He's in a relationship with his friend, but with graduation approaching, isn't it inevitable that their lives will go separate ways?

From FairGame:
"Next year, I wonder if I could see this scenery again." Maid of service, Tsumura Hana, and the young head of viscount family, Arima Mitsuyuki, had different birth and status. Meiji era distinct status romance, at end of Meiji era there was one love.
In Meiji year 43 (1910), ended the civilization and begin the westernization in capital city, Tokyo. Losing her mother and carring the young little brother, Tsumura Hana begin to serve viscount Arima family. By meeting the head of Arima family, Arima Mitsuyuki, it will alters Hana's fate dramatically. At the change of era, Hana's life will be tossed around.

N/A

From MangaHelpers:
After a terrible earthquake, Satoru wakes up in a pitch black cave that him and his friends were exploring. Desperately moving through the crumbling cave with just his backpack, he expects a warm rescue once he gets out. But what awaits Satoru was an unbelievable fact: Japan has sunk underwater due to the earthquake and he is stranded on an island with no one to help him. Can Satoru learn how to survive by himself?

From Hoshikuzuu Scans:

While searching the forests for a sage, Achille stumbles upon a beautiful boy named Raphie. While he is mesmerized by Raphie’s mysterious charm, Achille feels a sense of familiarity. Who exactly is Raphie? This is a tale of pure and eternal love.

Mouri has been dragged to a goukon (blind group date) by her best friend; but Mouri neither wants a boyfriend nor is afraid of showing her true self, as crude as her personality may be. But when she catches the eye of a guy just as relentless and creepy as her, how will she react?

From AQUA Scans:

Closet-otaku girl Hirayama lives a peaceful and normal school life. That is until she meets the smart, handsome and popular high-school president and discovers his secret. Her peaceful and quiet world is now starting to fall apart.

From Sura's Place:
A story of three female employees at a game company.
One of the female employees is a programmer, "a rare item."

A collection of short stories. Note that the vast majority of these stories contain heterosexual romance themes. A few stories explore transgender issues, but it's a stretch to call them shounen-ai or BL romances. This series demographic is josei.

Le théâtre de A
1.Oeufs D'ange - Tenshi no Tamago
A man is asked by a young painter to be her model.

2. Velvet Going Underground
A doll becomes a super idol. Hijinks ensue.

3. Childhood's End
Alastair runs away and meets the Rabbit.

4. Bite Me Something
Allistaire followed Mr. Rabbit all the way to Wonderland. Will he be able to find him among the crowd?

5. Long Along Alonging
A girl asks a vampire to be his apprentice. But what is her motive?

6. Till Dawn
In a dark tower, a caged voice is singing until a hunted man enters the darkness.

7. Leçon un
Sequel to Long Along Alonging.

8. My Skin on My Back

9. Highland Walker
Sequel to Leçon un.

10. Perfect World
The story of a young wife whose husband is infected with a fatal disease called Flower-Blossomitis.

11. Perfect Lady
Sequel to Perfect World and drawn especially for this book.

12-13. Looks Like a Teaspoon
A boy named Allistaire is often teased at his all-boys school. One night he dresses like a girl and stumbles upon the boy who often bullies him, Simon. Allistaire runs off into a tower and as Simon runs after him, we see the sign "Welcome to Wonderland" hanging by the tower's door.

14. The Pearl Blue Story
Do you believe in mermaids? Coggy, a young boy finds a mysterious lady laying down near the shore of the beach. He brings her home to help her.

15. I Am a Piano
A piano tells the story of her life and the people she encounters.

16. Parade

Le théâtre de B
1. Noël
A short story about a holiday romance.

2. Teddy Bear Satsujin Jiken (The Teddy Bear Murder Case)
Four murders have taken place at an all girl school. Lying beside each of the victim was a teddy bear with one missing limb.

3. Yonshimai Satsujin Jiken

4. A is for Alice
Alastair, a grown man, is off to follow the Rabbit once again to return to Wonderland.

5. Nedai no Musume Atelier no Musume (The Bedroom Girl, The Sculpture Room Girl)
A story about a girl in her death bed finding another chance in life in the body of a doll.

6. B&W (Black&White)
A story about a boy waiting for his sister.

7. Le Jardin du thé (The Tea Garden)
A mysterious story about a poor young man who orders a kind of tea called Huan Ying – “The Illusion”.

8-9. Free Fitting for Her
A priest and his captured vampire must save a naive and selfish young girl from the murderous desires of a Lolicon. But perhaps this girl isn't all that she seems.

10. Rose Dusk, Pale Moon

11. Hello, My Sister

12. The Happy Prince

13. Welcome to Wonderland
Simon, Alastair's old classmate, is now a grown man who bumps into his childhood Wonderland traveller.

Our protagonist Sungji just got hired to work at Hello Studio game development. Although most of the other employees are indifferent to her, there's one person left who approaches her. She's straightforward and rough, but cute at the same time. But this person is none other than Sungji's superior, Team Manager Sung Sumin... We present an elegant 19+ GL manhwa with shocking twists and turns!

Chika is a middle school transfer student, and she wants to make friends. But everyone is into karaoke, and she is too nervous and embarrassed to try! Will she be able to overcome her fear and become a karaoka?

Watami Meguru pleaded to his mom to let him move out on his own to experience being independent. She finally agrees to let Meguru rent out a room for the summer. But his sadistic mother makes the wall between him and his neighbor out of glass, meaning there is no privacy between the two rooms. If living openly with a stranger wasn’t insane enough, his neighbor is a cute girl his age, Kana. They immediately get off on the wrong foot and this isn’t what Meguru imagined it would be like at all.