Villain by Chani Lynn Feener

Nix Monroe has a plan.

Infiltrate the Enigma app and lure out whoever his cousin was last speaking with before everything went to shit. Nix won’t stop until he finds answers, even if that means transferring to a different university and getting entangled with the infamous Demons of Foxglove Grove.
Lake, West, and Yejun. Three of the most powerful men on the entire planet, and also the deadliest. When Nix finds himself on their radar, he thinks maybe it’s not all bad, and he can twist the situation to his advantage. It’s not long, however, before he discovers the Demons have their own objective.
Someone is after them, and they want to use Nix to lure out whoever that may be. Forced to pretend to be their new mutual plaything, Nix struggles to search for clues about his cousin and maintain personal boundaries between himself and the guys. They might take his body, but he refuses to give them any other part of himself, especially since there’s no way of knowing if one of them happens to be the person he’s after.