After Traveling into Xiuxianwen, I Became the Villain Bai Yueguang

After traveling into the Immortal Cultivation novel and becoming cannon fodder who was about to die in Chapter 30, Gu Nian'an decided to save himself - to find the world-destroying villain boy who was locked in the dungeon in advance and change his destiny before he turned dark. She used what she had learned in her previous life to appease his violence, and he used his instincts to protect her. But she doesn't know that she hides a secret more dangerous than him.