Giniro no Olynsis: Tokito

AD 3567. Mankind has lost its once great civilization, now living in the ruins of the aftermath. But even though their lives are threatened by Gardeners — mysterious unmanned mobile weapons (of different ranks) sent from the Moon — brave teenagers have to become Gardener hunters to earn their living. And although human civilization at large lies in ruins due to high-tech maintenance free technology, some parts of the remaining cities still work in limited ways, supporting the humans living there. One fateful day Tokito Aizawa meets Tea, awakening a power older and beyond that of the Gardeners, and inadvertently opening up the door to a possibly much brighter future for the remainder of mankind... (Source: AniDB)It is the year 3567 and an Olynssis barrier that disrupts space and time covers all of Earth. The planet is also being overrun by organic machines called Gardeners, which seek to exterminate all humans on the planet. Tokito Aizawa is part of a group of hunters who destroys Gardeners and sells the scraps. Although, after encountering a girl named Tea, who calls him ‘Koichi’, and her machine, Silver, his life becomes more complicated.