Kain

A blue-eyed boy travels through the countryside and arrives at a town governed by individuals known as "kidoushi." These figures originate from the newly established country of Ren and have machines implanted within their bodies, granting them military-level strength. The extent of their power corresponds to how much of the gigai, the internal machine, occupies their body. The story includes additional one-shot segments titled "Kain (Pilot)" and "Forest."