Master, Master, She Has Become a Demon.

"Master, intermarriage between master and disciple is taboo, why should you and I force it?" On the eve of their wedding, Yu Qianyin looked at the cold and dusty sword master Su Qingchen in front of her, twirling red silk between her fingertips, and smiled carelessly. In the book, she broke the taboo and fell in love with her master, but in the end she saw her master getting together with her disciple and grandson. Yu Qianyin just wanted to lie down and fish. The bound system forces her to conquer the great demon Ye Jin who "destroyed the world but was defeated inexplicably", otherwise her soul will be lost? She raised her eyebrows and raised her lips, teasing the arrogant young demon clan master with her backhand, which made the arrogant young master of the demon clan blush. She made the elder silent sword cultivator secretly think about it, and even the young general called "Sister Qianyin" after him. As for the demon master—— "Yu Qianyin, you are the only one allowed to come to this Demonic Burial Abyss." He pinched her waist, with paranoid possessiveness in his eyes. Su Qingchen panicked and knelt in front of her, lowering her eyes and begging: "Qianyin, come back, I was wrong." However, she stepped on the fear of everyone in the Immortal Sect, touched the magic lines between her eyebrows with her fingertips, and smiled wildly: "Master, it's too late." No one knew that she had already seen through the system's scam, and the hidden demon soul quietly awakened. The so-called conquering demon is just a cover. What she wants is to overthrow the law of heaven, make the immortal sect bow down, make the system annihilated, and make all those who covet her surrender obediently. In the end, the former female apprentice became the demon king in charge of the three realms, and those who had struggled with her all stood behind her, and she was the only one who dominated.