Overman King Gainer  

okg, 오버맨 킹게이너, オーバーマン キングゲイナー, 帝皇戰紀, OVERMANキングゲイナー

At some point in the future, humanity is forced to reside within enclosed cities due to environmental degradation. The Siberian Dome-polis serves as home for professional gamer Gainer Sanga and mercenary Gain Bijou, who lead an exodus of people out of the city with the help of an Overman.