Villainess Level 99: I May Be the Hidden Boss but I'm Not the Demon Lord Act 3 (Light Novel)

Things have calmed down since Duke Hillrose's coup d'etat, and now Yumiella can return to focusing on Dolkness County. Lady Eleanora has even moved into the Dolkness estate, making every day a little livelier as the county continues to flourish. Just when things seem to be back to normal, a mysterious boy that has been plaguing her dreams appears before Yumiella, claiming to be the god of darkness. The boy, called Lemn, says there are parallel worlds, and he knows that Yumiella isn't really 'Yumiella.' Will Yumiella have to reveal that she was from another world in a past life, and if so, what would that mean for her and Patrick? On top of that, Lemn reveals that one of his other selves was killed by...the Yumiella from that world?! Defeating a version of herself from another world would raise Yumiella's level cap, allowing her to surpass level 99, but can she face this god-killing version of herself?