Help me come up with a novel title

The female lead (Song Xihe) was a cold-blooded agent. He was ordered to retrieve a gemstone. She found out that the female protagonist was a cold-blooded agent. He was ordered to retrieve a gemstone. She discovered that the gemstone was once the collection of the male protagonist's (Su Yang, sunny personality) father, but it had disappeared into thin air not long ago. In order to find out the truth, she became the butler of the male protagonist and secretly investigated the truth. That was how she got to know the second male lead. After spending so much time together, the male and female leads developed feelings for each other, and the second male lead also liked her. Then, he learned that the gemstone was in another organization. Then, she planned to take back the gemstone and was injured in an operation. The male protagonist knew her identity and purpose, and the two of them split up. Then, after rational thinking and the second male lead's persuasion, the two of them reconciled. However, she failed in an operation, and the male lead sacrificed his life to save her. Later, the second male lead helped her complete the mission and died because of it. She swore to avenge them, but she was outnumbered. He was thrown into the sea and shot. At the critical moment, the male protagonist appeared and saved her. In fact, the male protagonist was not dead. He had been protecting her in secret. He knew that it was impossible between them and did not want to burden her. Then, they would destroy the boss of that organization together. The female lead returned the gemstone to the headquarters. He wanted to withdraw. After the headquarters found out about them, they wanted to get rid of the male lead, but she swore to protect him. In the end, both of them died. The gemstone was once part of the male protagonist's father's collection, but it disappeared into thin air not long ago. In order to find out the truth, she became the butler of the male protagonist and secretly investigated the truth. That was how she got to know the second male lead. After spending so much time together, the male and female leads developed feelings for each other, and the second male lead also liked her. Then, he learned that the gemstone was in another organization. Then, she planned to take back the gemstone and was injured in an operation. The male protagonist knew her identity and purpose, and the two of them split up. Then, after rational thinking and the second male lead's persuasion, the two of them reconciled. However, she failed in an operation, and the male lead sacrificed his life to save her. Later, the second male lead helped her complete the mission and died because of it. She swore to avenge them, but she was outnumbered. He was thrown into the sea and shot. At the critical moment, the male protagonist appeared and saved her. In fact, the male protagonist was not dead. He had been protecting her in secret. He knew that it was impossible between them and did not want to burden her. Then, they would destroy the boss of that organization together. The female lead returned the gemstone to the headquarters. He wanted to withdraw. After the headquarters found out about them, they wanted to get rid of the male lead, but she swore to protect him. In the end, both of them died. Everyone, please help me come up with a novel title. It would be best if it has two words. If it really doesn't work, the less the better. Thank you.