Collection of short stories with very light shounen-ai overtones:

1) Rakuen no Izumi (A Fountain in Paradise)
Ryuuji is bored and anxious for combat experience, but finds something more while protecting a scientist from one of his own creations.

2) Phenomena

3) EREHWON

4) EREHWON II

5) Hoshiboshi no Kouya kara (From the Stars of the Wilderness)

6) Shinya +1 (Midnight Plus One)

7) Shinya +1 II (Midnight Plus One II)

From ADV: A pizza delivery boy must save the world! Young Kenta Akagi has never been anywhere except for his hometown of Lutzheim, where he currently ekes out an existence as a pizza delivery boy. Faraway places, strange foreign folks, the wars they fight, and the adventures they have are just stories to him, until he meets a young girl - the kind of girl that wars are fought over! People seem afraid of her, but Kenta doesn't understand why. All he knows is that he seems to remember her from somewhere, and that he has to protect her no matter what!

From Del Rey:
In the near-future on planet Earth, a world gone mad where never-ending war is a fact of life, Kirio is the coolest kid at school. Up in the sky, a giant robot is fighting a fleet of gunships, but the brilliant and distant Kirio is far from fazed - until the battling 'bot makes an unexpected landing in Kirio's front yard and rings the bell. But the worst threat for Kirio could be what stands on the other side of the door: an alien invader robot with the face of an adorable girl!

In this dreamy science fiction fantasy, Junko Mizuno illustrates a story full of catfights, alien safari adventures, evil experiments, and a girl who dreams of becoming a pop idol singer. Following the Third World War, humankind left the toxic surface of the Earth and built an underground city to survive. A serious social problem has emerged in this new society: hyperorexia, or severe overeating, a side effect of the "Pure Trance" life-sustaining pill. The story begins in the hospital which has been ruined by a tyrannical director, Keiko Yamazaki...

Pure Marionation is the story of Anon, a "marionette" or android cute girl. Ostensibly, she is enrolled in Waffle High (no, seriously, that's the name) to test out her AI, codenamed ALIS. Immediately, Anon's secret is discovered by classmate Miamo, who is sworn to secrecy and determines to protect Anon from...I'm not sure what.

Taken from ozaku

From Ryoji Minagawa and Kyoichi Nanatsuki comes a world of nano-machines, cybernetic assassins, powerful telekinetic opponents, and secret organization dedicated to bringing forth the next evolution of humankind. Containing all the best elements of sci-fi, spy fiction, and conspiracy theory stories, Project Arms is about kids whose arms transform into grotesquely deformed superweapons.

From Cireus-Anime website: Saiga Junki is a normal high school boy who tends to be a little apathetic in general but who does manage to get better than average grades. When his archaeologist father, who went to investigate some ruins, is found dead, the family travels to the excavation site where Junki meets a mysterious stranger who gives him a ‘gift’: an ancient artifact that his father left for him …

From Yen Press:

This book contains three separate and unusual stories set in alternate realities. The first story, “How Martians Conquer the Earth,” tells the tale of a young woman struggling with the sudden death of the man she loves. Can anyone ever replace him? The second tale, “Is It Really Impossible?,” makes you wonder if a man and a woman can truly be just friends, especially in a world where women are such a rare find. And the last of the three, “Science Fiction Story,” is a sad tale about a girl who hates robots and the humanoid who serves her. The creator, who believes that the best privilege artists get is to ”lie,” creates a whole new world beyond your imagination.

From ADV:
Ray was bred and raised to be a living, breathing organ donor. After her own eyes were taken from her, a stranger bestows upon her the gift of sight and something extra - she has X-Ray vision! Ten years later, Ray works as a nurse and moonlights as an underground medical doctor performing for-profit, off-the-book medical procedures. But her daily routine is interrupted by a chance encounter with an old friend that triggers Ray's memories of her hellish childhood. Ray will begin a search that will lead her back to the people who stole her eyes-and her childhood!

From: Udon Entertainment
Enter an exciting new future with Mega Man ZX! Hundreds of years in the future, humans are able to merge with living ‘biometals’, transforming into Mega Men! But are even the combined powers of the Model Z and Model X biometals enough to take down the sinister Slither corporation?

A famous grim reaper without any fail.
Westernburg city's best hunter, Roi, known as 'Roar Scyther' for his trademark gun by the same name, goes on another mission for money!

Tatsumiyajima is the central island in the middle of a small cluster of islands, in a sleepy backwater of the Japanese isles. Not much happens there, and the island's young people go to school knowing that their lives are likely to remain peaceful and undisturbed. Or so they have been taught... but the truth is different. The fate of mankind is on the line, and Tatsumiyajima is the last line of defense against a hostile and incomprehensible enemy. At the center of it all, fighting for Humanity's continued existence, is the giant robot Fafner, the dragon that guards this final treasure of mankind.

Tatsumiyajima is the central island in the middle of a small cluster of islands, in a sleepy backwater of the Japanese isles. Not much happens there, and the island's young people go to school knowing that their lives are likely to remain peaceful and undisturbed. Or so they have been taught... but the truth is different. The fate of mankind is on the line, and Tatsumiyajima is the last line of defense against a hostile and incomprehensible enemy. At the center of it all, fighting for Humanity's continued existence, is the giant robot Fafner, the dragon that guards this final treasure of mankind.

Ten years ago an attack by giant monsters called Idola floating in the sky leveled Washington D.C. and awakened humanity to the existence of other life forms. It took years to develop a measure to counter them, via humanoid Idola-derived robots that are controlled by pilots via brain waves.

Ilya Kravitz is a young wheelchair-bound kid and prospective pilot taking the pilot examination who lives alone with his sister Anna Kravitz in New York City. Will he manage to fulfill his dream of becoming a Pilot? How will he fare against the Idola?

From Tokyopop:

Appearances can be deceiving. There is trouble in Tokyo as a mysterious terrorist organization called ALICE plots against the government. Just as the police are tasked to bring these men to justice, they are given a "secret weapon": a young girl with a mysterious past named Kasumi Asakura. She may look innocent, but she walks softly and carries a big gun.

Another dead body has washed ashore, and the adorably cute, pony-tailed doshin Aki wants to find the murderer. Instead he meets mysterious Kuga who seems to know more than he is willing or can say, but what else needs to be said as Kuga captures Aki's lips? Are Kuga's feelings real or is he trying to distract Aki from his investigation?

From Viz:

Shy Chise and nervous Shuji are high school seniors in a small town and have just started dating. But everything changes when Shuji discovers that Chise has been engineered by the Japanese Self Defense Force to transform into the Ultimate Weapon! Soon Chise is torn between realizing her potential as a devastating fighting force and her desire to share a bowl of ramen with her new boyfriend!

SIN takes place in a post apocalyptic future derived from a universe very similar to ours. The inevitable lack of resources to sustain humanity on Earth had split the world into two warring factions, the United Nations (U.N.) and the New Earth's Alliance. (N.E.A.). After years of unnecessary conflict and technological advancement in weaponry, both sides eagerly stumbled into peace to avoid extinction. Now under the rule of the newly formed United Earth's Federation (U.E.F.) space has become the last hope for the human race. However, with resources more scarce than ever the clock is ticking. How do we decide who's privileged to live and who's not? What happens to those of us left behind? A world now loosely controlled by a single totalitarian government, overrun by gangs, private military groups, freedom fighters, and death; Life seems to provide no more than a fruitless future. Regardless, there are still those of us that fight, we fight each other, we fight the system, we fight for our loved ones... whatever the reason, we battle for answers.

“This is a game of the world. Complete the task and get whatever you want. ” So-called genius, Xia Tian, is invited to a college where students challenge each other to fulfill their own desires. He encounters many different people from beautiful ladies to underworld mafia bosses. Will he rise to the top and learn the truth behind this game?

A short, sweet science fiction story