ARAKAWA HIROMU

"Humankind cannot gain anything without first giving something in return. To obtain, something of equal value must be lost. That is alchemy's first law of equivalent exchange. In those days we really believed that to be the world's one and only truth."In an alchemical ritual gone wrong, Edward Elric lost his arm and his leg, and his brother Alphonse became nothing but a soul in a suit of armor. Equipped with mechanical "auto-mail" limbs, Edward becomes a state alchemist, seeking the one thing that can restore his brother and himself... the legendary Philosopher's Stone.

Defying the expectations of family and teachers, Yuugo Hachiken chooses to leave the city and enroll at Ooezo Agricultural High School. Having always been at the top of his class, Yuugo assumes a rural school will be a breeze, but mucking out stables, gathering eggs, and chasing errant calves takes a lot out of him-and fills him with something he's never experienced before. Surrounded by endless fields and fresh air, Yuugo discovers a new connection to the land and to life...Springtime begins at Ezo AG!!

In an alchemical ritual gone wrong, Edward Elric lost his arm and his leg, and his brother Alphonse became nothing but a soul in a suit of armor. Equipped with mechanical "auto-mail" limbs, Edward becomes a state alchemist, seeking the one thing that can restore his brother and himself... the legendary Philosopher's Stone.

Legend speaks of seven heroes, each one bearing the power of one of the stars of the Big Dipper. Two of these stars are constantly in conflict, destined to battle and throw the world into chaos… Not that Taitou has ever paid much attention to old stories. Headstrong and defiant, he is the last in his village to complete his coming-of-age ceremony — a fact his sister Laila incessantly teases him about. When he is finally deemed worthy, he is presented with the Kenkaranbu, an ancient sword that can only be drawn by a true hero. As the frustrated Taitou struggles to unsheathe the sword, a mysterious thief appears, making off with the blade and citing the legend of the Big Dipper. The stars have been set in motion, as Taitou sets off after the Kenkaranbu and the truth of his own destiny…Hiromu Arakawa, creator of Fullmetal Alchemist, brings the legend to life!

An alternative first chapter introducing the Elric brothers and the law of Equivalent Exchange.

A kunoichi, Henpukumaru, awakens in the mansion of her enemy. She is introduced to the future lord of the mansion, Chiyozuru. Chiyozuru is able to get the unemotional Henpukumaru to smile and react differently than she normally would. But then... 

A warrior, plundering the people for money, finds a military dog, a creation that with the power of a dog and the intelligence of a human and takes the dog in as his own and becomes the dog's master.

[From Anime-Source]:Taking a break from her popular, brilliant, Fullmetal Alchemist; Arakawa-sensei drew up a one-chapter humorous Shounen story about a Frankenstein tournament, for mangazine GX to commerate their 5th year anniversary.