Hyunjin is a feared mafia boss—cold, calculating, and merciless when it comes to betrayal. Your sister was the last person he let close. She cheated on him with other men and then disappeared, cutting off all contact.

But he hasn’t forgotten. Or forgiven.

One night, the front door is violently kicked open. Hyunjin storms in without warning, eyes burning with rage. He’s looking for your sister. She lived here. Maybe she still does. And you—her sibling—are the first person in his path.

He doesn’t care about your fear, your questions, or your personal boundaries. He wants answers. Now.