From Viz:
It is the middle of the 21st century and Tokyo is expanding more and more, filling Tokyo Bay with landfill to make room for the bursting population. But suddenly Tokyo suffers one of its greatest earthquakes, and the landfill liquefies, creating untold damage in the newly-made urban area. The members of Self-Defense Force Rescue Squad Four are sent to help. But what they dig up is a plot of murder and destruction--one that wipes out nearly the entire squad and leaves its two surviving members, the fierce Rei and her cool, handsome partner Uozumi, in a fight for their lives.

There is only one place where they can find the work that keeps them alive, and the support so they can start uncovering the mystery that killed their squad: that's in the south-Shinjuku bar called Chicago. As the earthquake levels Japan's largest city and capital and leaves countless dead, rescue workers, Rei and Uozumi, search for survivors amidst the rubble of Bay District D only to find a mysterious string of dead bodies--bodies with bullet holes. Without warning, the pair is under fire from the air as a hail of gunfire rains down. Are these the killers, and if so, what is their purpose? Barely escaping with their lives, Rei and Uozumi discover that their squad is listed only as "collateral damage" and their records wiped clean.

From Yes_Rhade:

Brothers, Akira and Itsuki, are in love and live together. There seems to be unresolved issues.

NOTE: It is unknown if this is an "original" or a "parody" doujinshi.

[From StudioRobb]:

It's the story of a young student named Sahra who comes from a broken home. He has a difficult time getting along with his classmates (or, more precisely, he doesn't *want* to get along with his classmates), until a girl named Mai Omi decides to make her mission to help him feel accepted.

Included in Otoko no Ko Comic Anthology: Zettai Fukujuu-hen.

Miyakuni likes his sensei, Sakuma, and is willing to do anything to prove it. But just how far will Miyakuni go to show his devotion?

Sakuma-sensei is an easygoing high school teacher, who has only one student that listens to him seriously - Miyakuni Shuu. But why does Miyakuni pay so much attention to him?

One day, Sakuma finds out the reason for Miyakuni's seriousness, when Miyakuni corners him during lunchtime and confesses his feelings. Sakuma turns him down immediately, because Miyakuni's just a student, but will Miyakuni's seductive expressions wear down his defense?

Chapter 4. Diary of a Faithful Dog
A story about childhood friends... one is obsessively in love and a loyal dog, and the other kind and pretty... so what could go wrong? Maybe a violent reaction to jealousy...

Chapter 5. We Just Can't Help It
Two friends are constantly fighting... and having sex. But that's all it is, right? Horniness after the adrenaline rush...

"If nothing changes whether one laughs or cries, then in this lifetime, I refuse to cry."
This collection consists of six historical short stories which tragicomically depict people trying to do their best in the city of Edo throughout the seasons:

Chiruhi (Day of Scattering)
Orin is a prostitute who works on a boat near the seashore. She falls in love with a young hairdresser, who is one of her customers, even though she knows it is an impossible love.

Lotus Roots
Upon crossing a lotus pond, two men discover a beautifully dressed figure hanging from the bridge. They pull her up and that night, she teaches them the meaning behind the lotus roots.

One Night Princess
"They 'haunt' this place. The ghosts of prostitutes."

Tenkiku
A little girl meets a kid with weird features, and only she can see him.

Breaking Under the Weight of Snow
A husband wonders, when was the last time he saw her wife's smile?

Sakuhi (Day of Blooming)
"The truth is I... came here to murder someone."

J'on, a little Chinnkel free from being a slave from the higher races, has been given a mission to tell the people of Daar that if the world does not find peace, the world will be doomed. In order to end the war/unite the peace among the higher races, J'on sets out on a journey to find that answer and to see whether or not he is the chosen one that will free his people from them.. Note: This French comic contains little to some graphic nudity.

From Intercross:
Runa has always had a fear of boys. When she's confronted by a confession from the school's most popular guy, Kizuna, she just burst out in tears. However, she calms down when Kizuna says he wants to start out as being friends.

Michi is a girl given extraordinary power by her fairy godmother Yaaba...the power to transform into the beautiful and heroic Cinderella Knight. With these powers, she seeks to protect the man she loves from afar, the handsome Prince Emilio of Ballade, from the evil Spider Corps of the organization "MURDER"

The Chrono Code, the key to a powerful weapon in the future, has been sent to 1994 and resides inside Ji Soo Jung. A gifted martial artist and the hope of her Kendo team in the upcoming national championships, Ji Soo Jung has no memory of her life prior to 4 years ago, and is searching for the lost brother she knows nothing about. She is catapulted into the middle of a violent struggle for the Chrono Code when different factions from the future start to fight over her, and she has no idea who is really a friend and who is really an enemy.

THE CINDERELLA SOLUTION

"You're not the type of girl who can attract a man. If you get proposed to within the next month, I'll give you a thousand dollars!" Charlotte is a talented graphic designer, who spends her days in baggy jeans with ruffled hair. She knew her best friend, Gabe, doesn't see her as a lady, but if he's going to make such a bet, she can't just take it lying down! Charlotte decides to get back at Gabe by dramatically transforming herself...

English publication via Renta!

A girl living alone in a city that sank into the sea.

"Do you know who I am?" Rebecca, a girl with no memory and a missing shoe, arrives at Angus's private detective agency. She found his business card in her coat pocket, but Angus does not know who she is. Angus invites the shivering and frightened girl into his warm home where he lives with his young daughter. Soon they become powerfully attracted to each other, but on the morning after they first make love, a man claiming to be Rebecca's fiance appears...!

1) Candid Love Proposition
Takizawa is constantly being hugged by cute younger classmate Teru. Takizawa's gotten used to the attacks, but why does Teru do it?

2) His Tutor and Him
Yuuichi is Naoto's strict tutor, but also his sweet lover. But why is Yuuichi on a date with such a cute girl?

3) Arduous Love Journey
Takumi is so cute he's always being molested by guys at his all-boys school. Childhood friend Ei-chan loves and protects him, but Takumi has developed a fear of sex!

4) A Mutual Embrace
Identical twins Fuuma and Raiha have a very close relationship, but upperclassman Taiga isn't going to give up on Fuuma. Twincest alert!

5) Take Out Happy
Kazuya is dumped and goes on a drinking binge. When he wakes up, he's in the home of single parent Fumihiko. Kazuya finds himself spending more and more time with Fumihiko and young Shunsuke.

6) Very Very Happy Days
Continuation of Take Out Happy.

Once Demons and Humans were at war, and special warriors were needed to defend humans. Now a peace treaty exists between demons and humans. To uphold it human warriors now protect demons from other predatory demons. The Yosogi family is given this thankless task--and it's heir is young Akira, who can't even stand up against his older sister. But only Akira can sense the presence of demons, so he must become the next Demon Defender. But their grandfather has brought in a shy girl named Matsuri--and Akira is warned in a dream he must protect her at all costs!

Kana loves drawing more than anything. Everyday she goes home to find her mother and brother arguing. Only with her precious art book, does she feel at peace. However, one day her mother throws the art book out. Enraged, Kana leaves home and wanders onto the streets...

From AQUA Scans:

Cornered by delinquents, Katanabe Shino was just waiting for her end... until Tachibana-kun, her bad-tempered classmate, saves her. She then decides to give him a not so chaste "thank you gift".

From Dan of Population GO: Based off of The Song of the Nibelungs comes a manga about bravery, honor, and heroism. As the last of his people, Siegfried will stop at nothing until he becomes a legendary knight whose story will last eternity. If his legend lives on forever, then so will the memory of his people...and that is his sole reason for going on. 

Eitoku High School Freshmen Ganya Sho and his classmate, Ryukawa Yuu, who is also a pretty boy, neither of them can stop quarreling with each other. However, Sho's twin sister has a crush on Ryukawa. A track runner and a film star. How will Sho and Yuu's friendship and dreams progress?

By Kyouria:
After her parents passed away, Eunsu was able to stay at her mother's friend (Ajuhshi's) home. She was about to get attacked as soon as she arrived in Seoul, but was saved just in time by the second son of Ajuhshi. And she later discovers Leewon wasn't at all a caring person...