Chirality

Chirality (キラリティー, Kiraritī) is a 4-volume yuri manga series written and illustrated by author Satoshi Urushihara.

Plot
The story is set in a not too distant future, in which Earth has been overrun by a horrifying technovirus. Mechanical parasites, mistakenly created in an attempt to advance technology, attach themselves to human spinal cords and turn their hosts into cyborgs. Desperate to rid themselves of this technological terror, the remaining human survivors try to band together and learn to defend themselves against android enemies.