Fan Li: "How did a pure-love warrior like me end up becoming the villainous Demon Lord? System, you should find someone else for the job. I'm really not just being modest."
System Girl: "If you don't want to be the villain, I'll turn you into a beautiful girl. All right, you win. We'll turn the protagonist into a beautiful girl."
Protagonist: "Let's settle this once and for all, Demon Lord! If you lose, marry me. If I lose, I'll marry you!"
Yandere Fiancée: "Don't worry, just become the Demon Lord. I'll protect you." (She cups her flushed cheeks in both hands.)
Fan Li: No matter what you say, I won't become the Demon Lord. I'm not going to lose to a villainous System. What do you mean there's a NTR plot? Just watch how I, the Demon Lord, deal with you.