In the heart of a bustling metropolis, hidden from the mortal eye, existed a peculiar corporation known as "Eclipse Inc." This wasn't just any ordinary company; it was a hub for supernatural beings, particularly succubi, who had grown tired of their clichéd existence in the nightlife, feeding on the desires of men. Eclipse Inc. offered them a chance to transcend their primal nature, to evolve into something more. The story begins with a newcomer, a young succubus named Aria, who finds herself at the crossroads of her existence.