Villain: The Dragon King Returns, and I Become His Senior by Generations

[System + Villain + A Kind and Gentle Aunt] Cao Xuan awakens memories of his previous life and discovers that he has entered a novel world where the Dragon King has returned. Here, although he is the young master of the Cao family, the rulers of Yunhai City, he is a villain destined to die within the first three chapters of the original story. Fortunately, he knows the plot, and is aware that the Dragon King's weakness is his mother, Lin Wanqing. So Cao Xuan decides to go all in and wins Lin Wanqing's heart. When the Dragon King returns home after five years of training and opens the door, he sees two figures... [The blurb can't do it justice. Read the story for yourself.]