To save my friend, a masked man forced me to spy on a mafia heir. But what happens when my target is the only one who protects me?

I kissed a gorgeous stranger to spite my cheating ex. The next day, I moved into his mansion. Turns out he's my new, billionaire stepbrother. This is a problem.

I desperately needed a job. He bought my apartment and claimed I was his. But his true, darker secret was waiting for me behind a mask at a secret club.