>>713717424
Gal Gun takes place in a universe where a technologically advanced race of energy vampires (angels) steer human history in their pursuit of efficiently harvesting them as cattle for their love energy which turns into a sequel series where humans start gaining magic powers (which may or may not be caused by them interbreeding with the angels and demons because that's possible) and then begin to reverse engineer the angel's tech in attempts to create a limitless energy through literal human batteries and later harness the angels' pheromone magic in attempt to create world peace by mind controlling the psychics. In the form of catchy Jpop.

That's the abridged version