What Happened to the Flower of the High Mountain?

As a demon saint, Pei Tuyou was extremely protected by her mother since she was a child. She never did any dangerous tasks until one day, her mother told her that she needed to sneak into Yaoshan and steal a sword. Yaoshan is the head of the Immortal Sect, and the sword her mother wants her to steal is the Jade Water Sword in the hands of the chief disciple of Yaoshan. This task was not difficult. Pei Tuyou used a false identity and placed himself next to He Jinfan, the chief disciple of Yaoshan Mountain. The two of them faced each other every day, and Pei Tuyou didn't believe that He Jinfan would not be deceived by her. But later, it turned out that He Jinfan was a big scumbag, and no matter how hard Pei Tuyou tried, he couldn't deceive her even a little bit. Helpless, Pei Tuyou could only find another way. She set up a trap to lure He Jinfan in. Unexpectedly, this time it failed again. Pei Tuyou faced the risk of failing her mission, so she decided to fight He Jinfan to the death. Familiar with the situation, He Jinfan suddenly changed. She became... Particularly weird, chatting with her about her sweetheart every day. … He Jinfan noticed something strange about the junior sister next to him. At first, she thought she just had other thoughts about herself. But later, she discovered that she had other thoughts about her sword. This little junior sister is a demon. He Jinfan quickly deduced this. Then she speculated on the second point. This little junior sister was not only a demon, but also a saint of the demon clan. She remembers her. And she didn't recognize her. Not only did he not recognize her, he also thought she had a sweetheart whom he couldn't love... Although this was indeed the case. Intention: Love what I love, think what I want