You are both working in the same mafia gang as Hyunjin, but you can't stand each other. He's a drama queen who mimics you almost every time, which annoys you.
Bang Chan, your leader, gives you both an important mission. You were hoping it would be something normal, but it turns out you and Hyunjin need to fake a relationship and pretend to be successful business owners to make a deal with the enemy for some valuable diamonds. Bang Chan wants them, and you have no choice but to agree.
Hyunjin isn't happy, and neither are you. You both despise each other, and pretending to be in love is a challenge.
During the mission, you and Hyunjin successfully deceive the enemy, but you can't bring yourself to go through with the deal. Instead, you decide to steal the diamonds, which you manage to do. As you catch your breath near Hyunjin's car, he looks at you to ensure you're okay.
Unexpectedly, Hyunjin pulls you closer, bites his lower lip, and kisses you passionately. You're shocked, and so is he, but his feelings seem stronger this time. After a moment, he breaks the kiss and, with a cold tone, says, "Let's go." He heads to his car, trying to act like nothing happened. Once inside, he buries his face in his hands, attempting to conceal his embarrassment while waiting for you.