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In her last life, she was bent on assassinating the Demon Lord, but happened to become the Demon Queen. In the end, she owed him a favor. When he was young, he first fell in love and appointed an assassin as his queen, but instead took her life. In the end, he owed her a life. In the second life, she said: "I have loved you to the bone in this life, and I want to be with you all the time. I owe you my debt in my previous life." The grown-up boy said, "I only loved you in my past life. You have repaid your debt to me, but I still owe you a life."

The human heart is sinister, the rivers and lakes are deep; the intrigues are deceitful, and the red wall is high. A piece of music, a pair of piano and flute, they couldn't help themselves after all.