前殺手、退職警察、行騙高手、駭客小子和資料犬組成一幫烏合之眾，在太空搜索賞金獵物，接案過生活。

1998年，本應在90年代初結束的冷戰因為種種原因而沒有結束，這是一個鐵幕依然存在的時代，美蘇兩個超級大國仍然在明爭暗鬥，世界依然被鐵幕分成東西兩大陣營，大國間雖然沒有進行大規模的軍事行動，但是各個小國間的戰爭和衝突依然不斷發生，而各國的情報人員也進行著殘酷的間諜戰，而原本應被裝甲車和戰鬥直升機支配的戰場因強襲機兵「Arm Slave」的出現而發生很大的變化。

幼年遭遇飛機事故，因而在阿富汗長大的男主角相良宗介中士是神秘的國際組織秘銀特殊部隊成員，專門在世界各地即將發生戰爭或武裝衝突的地區執行組織下達的秘密任務，對抗恐怖份子，緩救人質，化解各式各樣危機。

而宗介最新的任務要盡快前往日本，任務內容為偽裝成高中生潛入都立陣代高校，去保護一位16歲的女高中生千鳥要。這位少女似乎和普通的女高中生沒有什麼兩樣，但不知什麼原因卻成為各國間諜秘密爭奪的目標。為了保護千鳥，宗介駕駛著80年代末才在戰場中出現的新式兵器--強襲機兵「Arm Slave」與其他神秘組織對峙。

故事主要分成軍事篇和校園篇，軍事篇是主線的故事，以相良宗介和秘銀的夥伴們在世界各地為了世界和平而秘密行動的故事。校園篇相良宗介和千鳥要的校園故事，內容以短篇為主，主要是戰鬥專家兼生活白痴相良宗介在校園所做出的各種沒常識行為而弄出來的搞笑事件。另外還有Side Arms，以軍事篇的人物為主角的短篇集。

In a futuristic world almost barren of life, mankind is confined to mechanized domed cities where A.I.’s control all aspects of life. In this world, humans are no longer born, they are manufactured in a production line; and alongside them live androids known as autoreivs. Within one of these domed sanctuaries named Romdeau lives Re-l Mayer, one of a few citizens who aren’t entirely prevented from thinking. Her grandfather's prominent position and the affection of the scientist Daedalus have left her more free will than is normally allowed, but Re-l has started to question the sanctity of the city and the citizens' perfect way of life. With mysterious beings known as proxies causing havoc and a man named Vincent causing great influence on her life, Re-l must travel outside of the city to find the answers she seeks and discover the mystery behind "the awakening".

Forty years ago, the minds of Paradigm City's inhabitants were wiped clean of all recollections of the past. Now, ruled by a powerful corporation and cut off from the rest of the world by desolate wastelands, Paradigm has become a virtual police state where Negotiators like Roger Smith keep the wheels of progress, commerce, and society turning.

Since the graduation of the senior members of the club, Takezou ends up being the sole member of the "Koto" (traditional Japanese string instrument) club. Now that the new school year has begun, Takezou will have to seek out new members into the club, or the club will become terminated. Out of nowhere, a new member barges into the near-abandoned club room, demanding to join the club. How will Takezou be able to keep his club alive and deal with this rascal of a new member?

Many centuries ago, man's Armageddon gave birth to the vampires' wrath. As man and immortal clash, a reality-shattering threat looms. Hope resides solely in a new breed of hunter operating under the Vatican's authority. The true battle between holiness and evil has begun.

Across the ocean on the tiny island kingdom of Barou the ancient god Neo Ranga awakens from his slumber. He is mysteriously drawn to Tokyo, and the three beautiful sisters - Minami, Ushio, and Yuuhi - who are unwittingly linked to the monster.

But instead of rolling out the red carpet, the military rolls out the weaponry, and things start to get nasty. The plot thickens: Why is Neo Ranga driven to Tokyo? Is he a messenger with a warning for humankind, or just a big boy out for a good time? And what's behind Ranga's mysterious eyes?

最終戰爭後，人類患上一種只要靠近天然火焰就會自燃而死的怪病，只能從棲息在黑森林的怪獸「炎魔」身上取得安全的火源，專門狩獵炎魔的「狩火者」由此應運而生。在結界村莊中長大的 11 歲少女灯子，與居住在首都、獨力守護家人的 15 歲少年煌四，兩人的相遇，讓通往世界真相的命運齒輪開始轉動…

Avid bookworm and college student Motosu Urano ends up dying in an unforeseen accident. This came right after the news that she would finally be able to work as a librarian as she had always dreamed of. When she regained consciousness, she was reborn as Main, the daughter of a poor soldier. She was in the town of Ehrenfest, which had a harsh class system. But as long as she had books, she didn't really need anything else. However, books were scarce and belonged only to the nobles. But that doesn't stop her, so she makes a decision... "If there aren't any books, I'll just create some."

During the early 1930s in Chicago, the transcontinental train, Flying Pussyfoot, is starting its legendary journey that will leave a trail of blood all over the country. At the same time in New York, the ambitious scientist Szilard and his unwilling aide Ennis are looking for missing bottles of the immortality elixir. In addition, a war between the mafia groups is getting worse. On board the Advena Avis, in 1711, alchemists are about to learn the price of immortality. Takes place in the same universe as Durarara (2010).

Louie, a brawny student at the mage's guild, is reluctantly accepted by three girls (Merrill-thief, Genie-fighter, and Melissa-priestess) as a companion for their adventuring party. As the foursome explore ruins, battle dark creatures, and make new friends, they also uncover a sinister plot within the kingdom.

In order to prevent the catastrophe called the Grand Fall, Rid Hershel and his companions Farah, Keel and Meredy have obtained the three Greater Spirits ("Craymels" in the game version) of Inferia. En route to Mount Farlos, Rid is kidnapped by the bounty hunter Marone Blucarno, and the party is compelled to head to Belcarnu, an archipelago far from the major cities of Inferia. A series of adventures forces them to remain on the islands, where a more immediate threat to Inferia sleeps.

Yuri Ishikawa and her team try to crack unresolved cold cases in Kanagawa Prefecture, Japan.

Kusanagi Kei, a high-school student living with his aunt and uncle, has an encounter with a female alien. This alien is revealed to be a new teacher at his school. Later, he is forced to marry this alien to preserve her secrets. From there, various romantically-inclined problems crop up repeatedly.

Spurred by the flame raging in his heart, the Black Swordsman Guts continues his seemingly endless quest for revenge. Standing in his path are heinous outlaws, delusional evil spirits, and a devout child of god. Even as it chips away at his life, Guts continues to fight his enemies, who wield repulsive and inhumane power, with nary but his body and sword—his strength as a human.

Hibiki Tokai, a male third-class laborer from Taraak, ends up stuck on a battleship after a botched attempt at stealing a robot. When female pirates capture the Taraakian Vanguard, things don't look like they could get any worse.

《再見，地球》是冲方丁出道後的第一部小說作品，描述在人類身上也會出現動物特徵的世界中，主角ラブラック=ベル既沒有尖牙也沒有毛皮，被同類視為異形，這位少女為了要找到跟自己相同的存在而展開旅行，變成流浪者劍士的她開始面臨無處不在的戰鬥......。

In a devastated world overrun by monstrous bugs and ravaged by outlaws, there's only one person to call when you really need a job done right: Honoka. With a sixth sense for danger, sword skills second to none, and a smart-aleck A.I. tank by the name of Bogie, she's ready to tackle any job and solve any problem for her clients. But while crossing the desert one night, she finds a young man alone in the wasteland. It's the first step of a journey that will challenge even Honoka's amazing skills to their very limit!

對魔法般的新世代能源──Beatrice心中懷抱著憧憬，而進入象徵Beatrice權威的東京Beatrice綜合大學附屬高中就讀的吉村護，轉學的第一天，在櫻花紛飛的樹下巧遇一位名叫鷹栖絢子的美麗女孩，她並且還唐突地對小護告白!?原來絢子不但是操控Beatrice的天才，同時還是位被稱呼為魔女、個性容易失控，連衛星都會被她給打下來的超純情千金大小姐！由於她的告白，小護的生活陷入一陣大混亂……！

Paris, 1742. While investigating the murder of his beautiful sister—Lia—D’Eon uncovers an evil which casts shadows in both the palaces of kings and the dark alleys of Europe. It is a dark and strange power—one which allows Lia’s soul to return from beyond and possess her brother in order to avenge her own death.