Gin-iro no Olynssis

In the year 3567, humanity has lost its former civilization and now struggles to survive on desolate land. Their lives are haunted by the "Gardener," a mysterious unmanned weapon from the moon. To survive, brave young men and women become "Gardener hunters," risking their lives for daily sustenance. Despite the collapse of society, fragments of advanced, maintenance-free technology still function in the ruins, providing limited support for those who remain. When a young boy enters one of these decaying cities, his arrival sets in motion a chain of events that will change their fates forever.