Villain's Counterattack: I Assassinate the Heroine Every Day

[Funny fantasy, novel and exciting plot] Lu Xiaoran, the super villain, returned to ten years ago after being killed by the protagonist's junior sister. At the same time, unlock the Big Demon King selection system. "Ding, choose to start." "The first step to enter the demonic path is to kill Xu Qingyan and obtain the supreme demonic root." "The first step to enter the righteous path is to help Xu Qingyan attain the path, establish a good relationship with Xu Qingyan, have a trust level of 100, and obtain the supreme immortal spiritual root." This gives me one more choice. Do you want me to be a decent person and hug the protagonist? No! I want to be a villain! He tried every means to kill Xu Qingyan, but found that the plot was wrong. Why does the protagonist break through every time he wants to kill him? Why does the protagonist become more and more fond of him and finally wants to pursue him? Why is he considered a great hero who saves the world even though he destroyed his sect? Why do you want to be a villain, but go further and further down the road to decency? [After reading ten chapters, you will hit me if you don't laugh. The introduction is weak, so please include the main text.