Flame & Shadow by AK Nevermore

Half-daemon Envy Starr is destined to die on Midsummer’s Eve, still a virgin, on some crappy cult’s live-stream feed. With thirty days left to live, the chance to escape her fate and get some action compels her into her absentee father’s world of beautifully cultured cruelty.

Once there, she’s the object of a deadly game, slated to alter the Fae realm’s power structure. Worse, the rules keep changing, and everyone has an ulterior motive, including her dae-licious guide, Brennan. Under a geas he’s desperate to break, she can’t trust him, or herself. Stupid Stockholm syndrome…

But unless she can come to terms with what lies in her heart, her unlikely survival will be a fate worse than death. For her, and the rest of Fae.