Fable For the End of the World by Ava Reid
Inesa lives in a post-apocalyptic world in which a major corporation, Caerus, is in control of society. When Inesa's mother accumulates too much debt, Inesa is chosen for the Lamb's Gauntlet, a live-steamed event that will showcase Inesa running for her life from one of Caerus' brutally trained assassins, Melinoe. But Melinoe isn't just a cold-blooded killer, and as the two embark on this cat-and-mouse hunt to the death, they might even be falling in love.