Taimanin: Gatchaverse

From the introduction: In the near future Earth has become plagued with demons from the dark world. While in the past these demons were more cautious about arriving in earth, the plans of the Demon Lords, as well as the corruption and hunger for power of various human factions and mass usage of dark technologies have driven demons to arrive upon earth in unprecedented numbers forming various factions all competing with one another for the domination of earth and humanity.