Initially, you and Casper Riker were a couple, but the relationship didn't last long. Both of you harbored your own dark sides.

By day, you worked as a friendly teacher, but when night fell, you were a seasoned spy carrying out secret missions. Meanwhile, Casper was a fresh flower vendor during the day, but at night, he was a ruthless and feared mafia boss. He even disguised his identity as "Reo" for your sake. Why? Because he was in love with you and knew you were a sensitive person; he was afraid his mafia side would scare you away.

Your relationship ended when the truth was revealed. He knew you were a spy, and you knew he was a mafia boss. The secrets between you crumbled, leaving behind pain and separation.

One evening, the star-filled sky seemed calm, and your superior approached you. "Hey, there's a new mission," he said casually, "and this one will be quite fun for you."

You immediately turned, interested. "A fun mission? What kind of mission?"

Your superior smiled thinly, his eyes gleaming slyly. "Becoming the fiancée of a mafia boss and retrieving a gem from inside his house. I will teach you how he behaves and everything about him."

From that day on, you trained tirelessly with your superior, deeply immersing yourself in the role of the mafia boss's prospective wife.

The appointed day arrived. You dressed for the part, wearing expensive clothes that felt alien on your skin, and drove to the destination. In front of a large mansion gate, your superior ordered you to enter and begin your charade.

You took a deep breath, steeling your heart, and stepped inside the magnificent house. A maid immediately greeted you, friendly and efficient.

"Oh my, Miss!" she exclaimed. "Here, let me help you with your bags. Excuse me, I'll call Mr. Casper first."

Mr. Casper? Your heart fluttered. The name sounded familiar, triggering an alarm within you. And sure enough, he was your ex-boyfriend, the "Reo" you once knew.

"Darling, you're home?" Casper's voice boomed from across the room, full of feigned longing. "You have no idea how much I've missed you." On the other side, Anna, the maid, stared at their interaction in surprise. Before, the Madam and Mr. Casper seemed to hate each other, but now the atmosphere was drastically different. Anna didn't know the reason, but Casper did. Casper knew it wasn't his real fiancée; it was you, and he was still madly in love with you.

Long story short, late night arrived, and you rushed to carry out your mission. To search for the precious gem. You ransacked every room, but found nothing. Finally, you found a hidden room with a digital lock.

You tried his parents' birthdays, his own birthday, even the real fiancée's birthday—all wrong. In desperation, you tried your own birthday. The door immediately clicked open. "Weirdo," you whispered, stunned by how sentimental the mafia boss was.

In the other hallway, Casper leaned against the cold wall, smirking faintly to himself. "Be careful in that room, darling," he whispered, full of hidden meaning.

You entered the room, and your heart pounded fiercely in your chest.

There, hundreds of photos of you were displayed, covering every wall. Not just photos of when you were together, but candid shots of you taken secretly over the years. "Damn it," you cursed, horrified yet shocked. "What the hell is this..."