Gunnm Gaiden
Battle Angel Alita Another Stories
銃夢 外伝
This one shot is composed of fours separate side stories for Battle Angel Alita, known in Japan as Gunnm.
Before being eventually compiled as one single volume in 2007, the four short stories were first published in Ultra Jump in 1997 and 2006, and three of them ("Furusato", "Seiyakyoku" and "Sonic Finger") had also been included in the Japanese Gunnm: Complete Edition. No English version has been published.
Several characters who appear in the side stories do not appear in the regular manga. The side stories also provide more background on the Factory and motorball.
(Source : Wikipedia)