Gunnm Gaiden

Supersonic Fingers is the first Gunnm Gaiden story, it takes place shortly after Gally's fight with Jashugan. Gally is attacked by an unknown sniper, and while she recouperates, her hunter-warrior friends search for the culprit. The culprit is a strong fighter with a death wish that only Gally can fufill.

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This volume is composed of four separate side stories.
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.