From Winter Translations:

Kotori Karaishi's family has a curse placed on them, of which they can only kiss one person their whole life. Kotori has tried her best to protect her lips...until a playboy became interested in her.

From Manga Abyss:

The grocery store's Mike, the fish shop's Kuro, the rice shop's Iba-chan, the soba shop's Kyuu, the yakitori shop's Sato, and the sake shop's Mamoru are childhood friends raised in the Galaxy Street's shopping center. When these six gather they are invincible, but after they entered middle school they stopped gathering!? It's an overflow of love and friendship in the lower part of town.

From Tokyopop:

In this delightful shojo romantic comedy, childhood friends Mike, Kuro, Iba, Kyuu, Sato and Mamoru - The Stellar Six - are the children of various stores located in the Galaxy Street's shopping center. When they get together, they're invincible...but, sadly, after middle school, they fell out of touch. Now they have to get to know each other again - and discover new feelings while rediscovering old ones!

The second official anthology of Aldnoah.Zero.

Hina is a typical game otaku ever since one can remember. The day he falls in love, he bumps into the worst scenery; his crush happens to be his mortal enemy's younger sister, Natsushiro Ryusei!
What shall the big brother say... Or probably request from Hina?

As children, twins Umi and Sora became acquainted with a four-year old Beniko. Years later, Umi has moved away, and Sora confesses to Beniko that he'll propose to her when she turns 18. But when Sora dies in a traffic accident, why does Umi appear before Beniko looking and acting just like Sora?

Long ago, a powerful demon lord ruled over the people until an equally powerful hero rose up to defeat him. To counter future threats, Rosewood Academy, a school for heroes-in-training, was created. Today, Rosewood Academy enrolls only the best of the best, and Arnest Flaming is the best of them all. The top student in the school, a dutiful girl nicknamed "Empress of Flame," she has an irritating encounter with a light-hearted boy in the school hallway one day who seems to equal her powers, though she's never seen him before. He introduces himself only as Blade, and Arnest soon finds out not only is he transferring into the school as a new student, but she is personally requested by the King to help him settle in to daily life in Rosewood Academy.

On the very first day that Kuze Aoi transferred to Hinomiya Academy, he finds himself facing down the barrel of a gun. He is introduced to the campus and the student body by his childhood friend Miyabi and learns about the prince and princess among students, Shitara Sagiri and Hinomiya Kuon. Sagiri is a cool and beautiful while Kuon is elegant and magnificent. After school, Aoi gets lost on campus and Kuon begins shooting at him and he's barely saved by a random girl named Atarashi Sonoko. It seems that Aoi holds a secret that is critical in a feud between two old, powerful families.

Volume 1:
Story 1 - Like a Lamb, Like a Wolf
Straight-laced magazine editor Shizutani Miyako, age 25, has taken every precaution to ensure a steady and predictable life. No surprise is a good one...until she meets Takamura Shuuichi, a photographer with a talent for bringing out the sexual beauty of a woman. Now Miyako is fighting to keep her hard exterior from crumbling (and her nose from bleeding!) over something as flighty as... love?

Story 2 - I Want to Lose Myself
Office lady Mayumi passionately loves ...her supervisor's work ethic? Her friends think it's weird that Mayumi isn't physically attracted to Kuroiwa, but she's just never thought of him that way... until now that it's been mentioned. One night after that, the two of them are working overtime alone when Kuroiwa accidentally falls asleep, and Mayumi decides to take off his shirt... and then his pants! And the only reason she stops there is because Kuroiwa wakes up! Mayumi's never had the hots like this before! What's an inexperienced girl to do? Especially when she gets found out!
(Also included in Yoshihara Yuki the Best Selection)

Story 3 - Please Punish Me

Volume 2:
Story 1 - 1001 Nights with You (1-3 chapters)
Ooizumi Sonoka is a hard-working OL (office lady) who single-handedly carries the workload of three, so she doesn't have time for love. After being slighted at a subordinate's wedding, though, she gets uncharacteristically drunk. When she wakes up, Sonoko is in bed with a strange man! She's so flustered that she even runs off wearing his pants by mistake! But she can't help feeling that she'd like to see him again... Then, the very next day, her new section chief turns out to be Houjou, the man she slept with!? In an attempt to prove to him that she's not just some lazy, drunken slut--she tries to show him how hard she can work...?

Story 2 - He's 100% SILK
The woman president of a women's apparel maker is Yumiko's mother and as a conspiracy sets up Yumiko to a blind date with a man Yumiko thought she met by chance?
(Also included in Yoshihara Yuki the Best Selection)

Volume 3:
1001 Nights with You (4-8 chapters)

Volume 4:
1001 Nights with You (9-13 chapters)

Volume 5:
Story 1 - 1001 Nights with You (14-16 chapters)

Story 2 - After Black Tea

Volume 6:
Story 1 - Honey Moon
The continued adventures of Sonoko and Houjou.

Story 2 - Though Thou Canst Smell the Colors

From Yen Press:

All penniless college student Taiga Mutou wants is a cool job and a cute older woman as a girlfriend. So when he spies a Help Wanted sign outside an office and a hot girl inside, he applies for the job, no questions asked. After a few bumps at the beginning, things start going Taiga's way, prompting him to steel his courage and ask out Yuiko, that hot girl he spied through the window, on a date. And when she later asks him if it's okay that she's a fujoshi (a very, shall we say, distinct kind of comics/animation geek), he tells her it's fine out of sheer excitement. But poor Taiga has no idea how much trouble he's just gotten himself into!

A robot with a heart, and the scientist who saves her...

Note: scanlators had a typo when translating the name.

From Whitelies Fansub:

Hasegawa Mitsuki, a college freshman. Mitsuki has been thinking about the same person since she was 16 years old. That person, being 18 years older. A Coffee Shop Manager, Asai Ryusei, a widower with an only son.
To Mitsuki, Ryusei is a really important person but, her romantic interest for him is slowly...?!

Volume 1:
1-3) Dakaretai Otoko No.1 ni Odosareteimasu.
I'll make it so your body's unable to forget mine.

Saijou Takato's 5 year reign as the "Most Huggable No. 1" has been snatched. Stealing his thunder is the newbie actor with a 3-year debut, Azumaya! Towards the stuffy hostile Takato, Azumaya's sincere sparkling smile starts to become effective. Even as Takato sets his alert level on MAX, Azumaya catches Takato in his shameful drunken state and uses it to blackmail him! In exchange for Azumaya’s silence, Azumaya states, "Please let me hold you"…?! "Embrace me, who was the Most Huggable No.1? What the heck is he saying!" Includes a large quantity of other high suspense erotic stories ❤
(From Starry Sky Scans)

Sidestories:
Mayoeru Kamisama ni ai no Te wo
Netorare Triangle -part 1-
Kare no Sadist Switch
Kousha Ura no Natsu
Heartbroken Manabu-kun keeps meeting up with his senpai in the back of the school, who appears to be keeping a secret.
(Also included in Fubin BL)

Volume 2:
4-8) Dakaretai Otoko No.1 ni Odosareteimasu.
Takato-san's and Junta-kun's story continues ...

Sidestory:
Netorare Triangle -part 2-

Volume 3:
1-5) Dakaretai Otoko No.1 ni Odosareteimasu. Chapter 0

Sidestories:
Netorare Triangle -part 3-
Dakaretai Otoko No.1 ni Odosareteimasu. Sono Ato

Yuuki is a university student bored with his ordinary life. One day after returning home after class, he finds a strange chocolate tin in his bag. Inside it is a letter with "I want a friend" written on it by an unknown sender. When he writes a reply as a joke, the next morning another letter is inside it...

Also included is Haru, Hinata no Koi and Koiiro Milky Way.

1. Mysterious Person
Ruka is a high-school girl who holds affections for her teacher, Tokio. But one day, a mysterious person shows up and claims that he has come from the past! Not to mention, he calls himself by the same name as her beloved teacher, Tokio. What’s more unbelievable is that both “Tokio” have the exact same scar engraved on their palm…

2. A Small Love Story
Hashi is one of the two sole members of her school's literature club. The other one is the romance-novel-loving club president Madoka. By chance, he finds out that her deceased grandmother happens to be one of his favourite authors. When he asks her to provide him with some original material, it sparks a change in her disinterest in love stories and their relationship.

3. Chloe the Devil
Chroe is a loner because she has a reputation of bad things happening around her, especially to people who piss her off. What her classmates don't know is that she's a demon who causes misfortune on whomever she beholds. One day, while being confronted by a group of girls, Kikuchi defends her, causing her to look at him in surprise, which in turn causes him bad luck. Chroe starts avoiding him, scared of accidentally causing him harm, but Kikuchi is relentless in his pursuit. Chroe finds herself being drawn to him, but how is a relationship possible when she can't even throw him a glance without something bad happening to him?

4. Alice in Wonderland
Ruu's mother just committed suicide and everyone can't stop gossiping about it, except for her new boyfriend, Mitsu, who acts like everything is normal. With everything going on, Ruu wants to seek comfort from Mitsu, but since her mother's passing, he hasn't touched her. Does Mitsu want her to disappear, too?

5. Sugar-Coat
Ako is a seventeen-year old who is in love with her cousin (who also happens to teach at her school), Shou. Shou is getting married in a month and Ako is acting out to get his attention, and to prove to herself, and to him, that he cares about her. Shou is getting increasingly worried by Ako's erratic behavior, which only started somewhat recently. Can Ako get over her feelings? Or will she lose herself in a path of self-destruction?

6. The Star and The Heart
Mini and Mani are identical twins who are best friends, and do everything, and go everywhere together. To help people tell them apart, Mani wears star earrings and Mini wears heart earrings. Life is great, until Mini suddenly acts loopy and distracted. Mani discovers that Mini and Suga have fallen for each other, and Mani is jealous that despite being identical, someone likes Mini, and no one likes her. On another level, she also feels that Suga is taking her best friend away from her. To what lengths will she go to to keep her sister close?

Collection of oneshot stories: 1. Is love between adults and high school girls really taboo? Ritsuko's boyfriend, Yuuji, is an outstanding office worker who works in a foreign company. He always treats Ritsuko like a little kid just because he is seven years her senior. Does Yuuji really like me? Ritsuko is always insecure. Do I really like Yuuji? Can we really be together? 2. Taiyou and Daichi are twin brothers, who have been Aya's childhood friends but.... 3.Minori is a shy girl who has a black cat she named Night, whom she loves very much. One day Night runs off. Will she ever find him and bring him home?

From Blue December:
I have no father to call Dad.
I have no siblings to call brother.
I'm a girl with hardly any siblings.
The smiling angel Choi Mi So.
Even if I'm lonely, I stopped crying when I turned 12.
Because WooJin Oppa came into my life.
However, there is a secret behind her smile.
She isn't close with her mother?
But is she close with the love of her life, Woo Jin Oppa?
Then what about my boss? Yu Ri?
Why is my life so difficult and complicated?
I'm only 17 years old!!

Overworked, still single, 38-year-old salaryman Sakurai Kazuaki collides with a young man at the train station - causing the magazine he was carrying to be spoiled. This young man, Minagawa Youichi, is a student at an art college and lives in a big, old-fashioned mansion with two of his cousins. Since he happens to own the same magazine, he takes Sakurai to his house, saying "If I trade my copy with yours, you'll have nothing to complain about, right?"

Despite feeling annoyed and frustrated by the unsociable Youichi's arrogant behaviour, Sakurai soon finds himself a frequent visitor of the secluded household, inexplicably drawn to its enigmatic owner...

A series of loosely-connected vignettes, each lead to the next by a stray thought. A young hit-man chased from his home; a dropped key to a bloody room; a meat-locker to hide a corpse; the watchful eyes of crows; a criminal's chance at salvation; the sight of music in the air. Where will this story take you, and in what place will it end?

A bustling city, crowded streets... But always would the night fall... And when it does, in those dark corners, who is staring out unnervingly? Who is laughing hauntingly? How many secrets, how many tears are silently echoing in this endlessly lonely void?

Koizumi Yuta is a 14-year-old boy who has quite a bit of a problem. The demon princess of the magical world, Lucia, has to procreate with him. That child would have the ability to engulf the entire world for seven whole days. Mikamoto El and Kasukabe Rie are the two angels assigned to make sure that doesn't happen. Kasukabe Rie happens to be the girl he likes. Just how is he going to survive this ordeal?

Note: Included in the limited fourth volume edition is a special collaboration booklet (comic) between Princess Lucia and Kimi no Iru Machi.