From 801 Media:

Being with an older lover is hot on just so many levels... Seiji-kun is a novice manga artist. He's also completely addicted to the body of the incredibly beautiful Sono-san, despite the fact that Sono-san is a guy. Is this love? Along with the title story, one that paints a tale of youth and emotion, this volume is filled to the brim with stories of overwhelming density, including "Not Just When it's Convenient" and "Let's Go Home." A total of six stories in all.

• Onegai dakara, Kiss (w)o Shite (Please, Kiss Me)

• Otona no Tsugou ja Naikute (Non-Adult Situations)

• Gaki wa Sunao ja nee (Indirect Youth)

• Aiganbutsu wa Oheya no Naka (Trophies Belong in the Bedroom)

• Ouchi e Kaerou (Come Home)

From Attractive Fascinante: Sensei rejected Fuji when Fuji confessed to him on graduation day. After that, Fuji always visited sensei and they still went out together. Sensei realized his feelings gradually and hoped to start afresh with Fuji. However, Fuji couldn’t believe it. But when Sensei’s ex-lover, Namiki, came back and wanted to reconcile with Sensei, both Sensei and Fuji found that they could no longer hide their own feelings anymore.

As a transfer student to a rough, run-down school populated by delinquents, Shindou tries his best to make friends. When he meets the ill-mannered Yousuke, heartbeats and tempers start to fly! It seems Yousuke is a "tsundere"--his gruff exterior hides a shy, sensitive side--and Shindou immediately finds himself dizzy over his combative new crush. Can Yousuke accept a relationship that goes against his tough-guy image? Or will his tendency to lash out at everyone around him drive even the earnest Shindou away for good?

From Viz:
Hime Kino's dream is to one day perform voice acting like her hero, Sakura Aoyama, from the Lovely Blazer anime. So getting accepted to the prestigious Hiragi Academy's voice actor department is the first step in the right direction! But on her first day of class she meets Sakura's grouchy son, Senri, who tells Hime that her voice is awful and Lovely Blazers is stupid. Hime will not let that stand unchallenged. She'll show everyone that she IS a voice-acting princess, whether they like it or not!!

Nagisa and her beautiful, intelligent best friend Yumi couldn’t be more different. Of course, her childhood friend, Ryou, is always happy to point this out whenever he can. When Yumi gets a crush on the equally intelligent and handsome Kei, Nagisa is determined to get the two of them together like any good best friend would, but it seems that Kei likes Nagisa’s outgoing personality more than Yumi’s shy one. And where does Ryou’s crush on Nagisa–and the one she may have on him–fit into all of this?

Shiina Momose doesn't believe in fortune telling and the occult, but for some reason, she can destroy anything with a touch. One day while on her way to school, a young man approaches her and claims to be a God. Furthermore, he believes that he was guided towards her and for that reason he has become convinced that she should become his first follower! Naturally, Momose refuses; but when strange things began to happen... she can not do something about it!

Tachibana doesn't have it easy. His lover, Sawada, just doesn't care who sees them kissing! Tachibana doesn't want people judging them, while Sawada just wants to show his love when he feels it. Will everyone find out what kind of love they have?

From Aerandria Scans:

Life isn’t sweet... Asaoka Yuuri, a senior in university, has failed for the 49th time in job hunting. During an exam at the 50th company, which should be a commemoration for her, she came to know Manabe Ryouji, a famous guy at her university. The first impression was horrible. But what will happen to Yuuri, who started to be attracted to Manabe, who looks cool and can do everything to the point that it’s annoying...?!

From Del Rey:

Everybody at Seiyo Elementary thinks that stylish and super cool Amu has it all: But nobody knows the real Amu, a shy girl who wishes she had the courage to truly be herself. Changing Amu's life is going to take more than wishes and dreams - it's going to take a little magic!
One morning, Amu finds a surprise in her bed: three strange little eggs. Each egg contains a Guardian Character, an angel-like being who can give her the power to be someone new. With the help of her Guardian Characters, Amu is about to discover that her true self is even more amazing than she ever dreamed.

Contains the side story Shugo Chara! Encore! in volume 12.

Shugo Chara! was awarded the 2008 Kodansha Manga Award for best children's manga.

Midori Yamate is a 15 year-old girl and is very much a tomboy. When she was young, Midori meets a boy called Tsukasa Hino, who came to the island she lives on for a holiday. He teaches her to play soccer and she falls in love with the sport. Midori is inspired by Tsukasa and continues to play soccer in hopes that they would meet again someday. When they do meet again Tsukasa does something unforgivable. Determined to defeat Tsukasa on the soccer field Midori enrolls in an all boy high school.

Contains a short story of 2 chapters called Shounen x Cinderella in the 8th and 9th Volumes:
Sakuragi Azuma has a secret that no one should ever know about: he's actually Momo Kasuka, an up and coming female model! While shooting a new drama, he meets another arising newcomer named Yui Hazuki, and things are going to get heated!

From Blissful Sin:

1-2) Shoujo Mangaka no Koi (Love of a Shoujo Mangaka)
(Adapted from the original oneshot)
“If I could be of any help, would you want to try it?”
To help incorporate boy’s love elements into his work, the unpopular shoujo mangaka Akimoto Yuu and his editor, Kurata, decide to carry out their own experiment.

The story of an awakening love that is embarrassing but warm.

3) Shoujo Mangaka no Koi Omake

4) Seppun Shuugyou (Kissing Lessons)
Seiji still thinks about the time he walked in on his childhood friend Daigo masturbating. Now Seiji can't help but do the same when he remembers it and it seems Daigo can't either; so what will our frustrated couple do when a co-worker takes a sudden romantic interest in Seiji?

5) Natsu wa Hagakure (Shadowed by the Leaves of Summer)

6) Hug Me, Hold Me

7) Tokyo Hotel

8) Passionate Pen Pals

Afterword

Even though she loves singing, due to fear of her older brother's disapproval, all Nonoko Sugisaki can do today is wish on a shooting star. But then, Kenji and Mikki, who hear Nonoko singing, decide to ask her to join their band...?

From Fantasy Shrine:

1-2) Butler Teaches Lesson of Love
"I've saved myself for you because you're my only master for life!"

Sera was acting out his rebellion against his parents, when Makieda, a former butler, came into the picture as a substitute teacher.

Under Makieda's guidance, Sera learned more than just becoming a gentleman. He also fell in love with this butler-turned-instructor. However, will Makieda choose duty to serve his former master over love? See how these two struggle to master the lesson of love.

3-5) Social Dance for Men
Thanks to an unfortunate accident the President of the Social Dance Club is now allergic to women, but that's not going to stop him from finding the perfect dancing partner.

Extra) The Butler Becomes Jealous at Night

A collection of short stories:

1. Mune no Kodou (Please Feel My Pulse)

2. Senaka Made no Kyori (The Distance to Your Back)
Ishikawa feels that his relationship with Yamaguchi has entered a stale period. Why is Yamaguchi ignoring him, and how can he get the spark back? The couple from Mimitabu no Riyuu.

3. Shitasaki no Netsu (Warmth of the Tip of the Tongue)
Valentine Day special with Ishikawa and Yamaguchi. Eight years later, they are still the same.

4. Kurubushi no Hone (Ankle Bone)
Ishikawa, being a klutz, is home for Golden Week, and Yamaguchi is going to nurse him back to health... sort of? The sweet couple is back and enjoying their first holiday together!

5. Takayanagi no Bangohan (Takayanagi Family's Dinner)
The Takayanagi family is very busy, since their parents are off on business in India. The eldest brother has no time to babysit his two younger (slutty) brothers, a NEET and a high school student, and hires a housekeeper who's a bit too cute for his own good. Or... is he?

6. Kotokunibito - Stranger (Gentiles - Stranger)

7. Mienai Shippo (Invisible Tail)

Collection of oneshots:

1) Shiro Neko (The Cat Shiro)
Sensei is a veterinarian who works hard and always sleep in the last train. One day, a boy wake him up and all that he thinks is "Kind childen really do exist"... But is that little kid really kind? Or is he like a stray cat?

2) Sweet Days
Asai and Yoh were childhood friends, but Asai had to move out, so he leaves a lesson to Yoh: "You should get stronger". Years later, Asai is a new student and, whoa, Yoh studies there too, but... He became a deliquent?!

3) And Sheep
"It's impossible to talk to animals", that what Lin said when he was visiting Kuranosuke, a genius that knows everything about quantum physics, fundamental chemistry and medicine. After eating with him, Lin goes home and sleeps. On the next he wake up a little... Animal?!

4) Himitsu no Hanashi (What We Keep Silent About)
Yori has a homossexual brother and he just can't stand that. But, to be more complicated, Kawamori, a close friend, likes him. Yori tries to ignore it, but when a girl appears, what will he do? "What if Kawamori falls for someone else...".

5) Endless End
One day, Akutsu meets Mizumoto in a empty street. "I'm glad I meet you. I was wondering what do to if I were the only one alive". Those meetings keep on going when they are alone, but in school Mizumoto ignores him. Will they only talk in a empty world?

6) Summer Vocation
A extra from Sweet Days, with Asai and Yoh's young brother.

Shino Satomi is jilted by a girl because she does not feel his "manliness". He is comforted by his best friend, Mamoru Hasegawa, but fails to enter the school of his first choice. Both enter the same all-boy high school, very unique school because most students are homosexual! They occupy the same room in the dormitory and Mamoru hides his love for Shino and keeps guard against the other students...

A collection of one-shots.

1) Shinu hodo Suki (Love you to Death)
Eto & Yanagi were always been good friends, but after Eto confessed to Yanagi the latter started to act cold toward him. One day, one month before graduation from high school, Eto met Yanagi and his friend Yutaka by chance in the train...

2) Suki sugide Kirai (Hate to Love)
Continuation of "Shinu hodo Suki" from Yanagi point of view.

3) Jyuu Shuunen Omedetou (Congratulation on Ten Years)
10 years after the events of the two first stories.

4) Kegarasu (Morning Call) [Correct title: Akegarasu]
Yoshimura Keiichi was seen with a man by his Subordinate Sakura in a Love hotel, and for some reason, Sakura asked him to meet him after work in the next day. Dealing with the circumstances seem to be not as hard as expected.

5) Yume no Awayuki (Snowfall Deams)
Continuation of "Kegarasu".

6) Aokute Gomen (Sorry for Being Inexperienced)
From the first time that Miyahara saw Kurotani row he wanted to have sex with him.

7) Onna ni Shika Wakaranai (Only Women Understand)
Hirasawa & Hanamura Seems to have the same tastes in food, drinks and girls...

8) Ai ga Doushita (No Need for Love)
A continuation of the 2nd story from Dare ga Omae wo Suki dato Itta:
Kouta, Madoka's riotous teenager son, meet an Intriguing older man in Kentarou's gay bar...

Extra) Ai ga Doushita Omake

Higuchi Asuka's mother dies shortly after she tells her teenage daughter who her father is. Only knowing the family name “Sudou”, Asuka goes in search to find her absent father.

On her journey, she finds a guy being rather rough with a younger girl. Unable to resist, Asuka steps in by battering the guy with her motorcycle. When she discovers it was a big misunderstanding (Manato was just trying to get his sister Kazusa to go home), she drives them back to their house.

Once there, Asuka finds out that Manato and Kazusa are the Sudou family she's been looking for, but the father isn't there, not to mention their mother also being dead since long ago. With no other leads, Asuka decides to move in as Neesan (the big sister) until their father shows up. Things get tricky when love builds within the complex family relationship...

Oneshot in the last volume: Otome no Jijou

Tenchi Masaki is a shy high school boy, yet honest and hard working. He looks forward to living a basic humble life, taking over his grandfather's shrine. However, nothing is ever as simple as one would want, as Tenchi soon learns. A series of events beginning with the sudden appearance of Ryoko, the space pirate, creates madness in his home. Now he must figure out how to juggle 2 princess's, a space pirate, 2 galaxy police, the worlds most intelligent genius and a Rabbit-turned-Spaceship in his quiet country home.

From Manga Art:
After Daa! Daa! Daa!, Ruu is now a cheerful youth living in his home, Planet Otto. Then, a confused girl named Miu arrives through a wormhole from Earth. Ruu joins up with her and promises to take her home. Unknown to Ruu, Miu is the daughter of the same people who took good care of him in his stay on Earth.