From Fantagraphics:
A DECADE-SPANNING JOURNEY INTO DARKNESS
Even as butterflies ominously proliferate in town, the rumor of a mysterious creature lurking in the tunnel behind the school spreads among the children. When the body of Arié Kimura's mother is found by this tunnel's entrance, next to apparently human traces, the legend seems to be confirmed. Is the end of the world coming? In order to appease the wrath of the beast, the children decide to offer it a sacrifice: The unfortunate Arié, whom they believe to be the cause of the curse, is shoved into a well that leads to the Nijigahara tunnel — an act that in turns pushes Komatsuzaki, the budding thug who has carried a torch for Arié for a while already, entirely over the edge.
But this is only the beginning of the complex, challenging, obliquely told Nijigahara Holograph, which takes place in two separate timelines and involves the suicidal Suzuki; Higure, his stalkerish would-be girlfriend; and their teacher Miss Sakaki, whose heavily bandaged face remains a mystery; and many more — brothers, sisters, parents, co-workers, teachers, aggressors and victims who are all inextricably linked to one another and all will eventually — ten years later — have to live with what they've done or suffered through.

In the Nacchan no Romantic Love series:
V.1 - Kimi wa Ima mo Kimi o (僕は今も君を)
V.2 - Naisho de Kiss o Shiyou (内緒でキスをしよう)
V.3 - Nigeru Natsu (逃げる夏) (Summer of Escape)
A collection of short stories.
The title story focuses around Chihaya, who has a crush on Morisaki. However, the flower arranging school she inherited from her father isn't doing well, and her step-mother wants her to marry into another school to revitalize it. Chihaya disobeys her step-mother and runs away, only to be later rescued by Morisaki. Unwilling to go back home, Chihaya starts to spend the summer at Morisaki's place, painfully aware of the situation... though Morisaki doesn't even seem to notice.
- Storm in Heaven

Sanako is a 10-year-old girl who lives with her father in Tokyo. Inside the gray building which is their home, they have created a sky garden full of huge, green potted plants. In this city oasis, kindhearted people meet…

From Storm in Heaven:

Chidori absolutely hates men. For her entire life, she's been forced to put up with a bunch of irresponsible, useless slackers, and she's sick of it. Can one innocent little lie change how she feels about men?

Hana becomes the substitute landlady of the sharehouse her parents were managing. She's all exhilarated to get the rental income-- at least, that's the plan. Oh dear, there's no rental income?! At her wit's end, Hana puts her parents' vacant room for rent. A sweet and bittersweet love comedy that unfolds at the share house.

The series follows Chitose Karasuma, a university student who aims to become a voice actress.

Morishima Akiko's "Off Time" is about growing old with the one you love.

Omoigabuchi, a pond with a legend attached: "If two people go in together, they will be bound to each other for life."

The story of three couples who get dragged into this love pond.

“Ever since I was a little girl, I’ve been infatuated with the “other side”; the world of splendor. Yes, I wanted to become one of those glittering stars. And so, my dream has come true. But now…All I want is to be beloved by someone.”

When she was young, Yukino Miyashita wanted, more than anything else to become an idol. After accomplishing her dream, however, the idol group she was part of failed to sell, and she returned to school, facing alienation from her peers. Now, at age 18, Yukino is living alone in Tokyo, half-heartedly trying to start a new life as a talent manager, while not quite able to put her idol days behind her. She meets Setsuko, a songwriter who also once belonged to a failed idol group. The romance sparked by her encounter with Setsuko causes Yukino to reevaluate her own life.

In order to benefit their families, Koyuki (Age 16) was wed to Shin (Age 37). Despite the large age gap, both are exceedingly inexperienced in the matters of love, so they never quite know how to act around each other. To make matters worse, Shin is forbidden from being physically involved with Koyuki until she turns 20. In this environment, how will they form a proper husband-wife relationship?

A guy likes a girl in his class so he confesses to her, only to find out that she has vines growing on her body. What is this mysterious affliction, and how does it affect their love for each other?

A silent oneshot, featuring only sound effects and an opening & closing narration. focuses on the daily life of a woman who, after a long summer day of construction work, goes to the store to buy some potato chips.

Pairing: Segawa x Manaka

Himawari - Kenichi Legend is a gag manga based on the manga author's real life story.
Himawari is about an OL named Akiko who is very good at drawing illustrations for her company bulletins. She drew manga as a kid, but hadn't pursued it. Her father Ken'ichi works at the same company. He is a tropical fruit freak & is on a different wavelength than others.

Note: Was nominated for the 1st Manga Taisho Award in 2008.

A guy likes a girl in his class so he confesses to her, only to find out that she has vines growing on her body. What is this mysterious affliction, and how does it affect their love for each other?

Mom's warmness. The sunset I watched with my friends. The summer we played in the pond. That day I left everything and abandoned town.

Mitsuya is a third year high-school student who's studying for his exams. Noko, a girl two years younger than him, is his childhood friend. "Nomino" (Know Me Now) shows their relationship as they go about their everyday lives.

Rakudai Ninja Rantarou is about a boy who wishes to become a chou-ichiryou-ninja (aka, the number one ninja). There is only one problem: he keeps failing. Together with his friends, they encounter mishap after mishap as they seek to eventually graduate from the first grade.

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.