Villain: I'm Really Not the Demon Emperor

I am a little black dragon and a human! I'm a professional villain! ! I am a villain who drives the hero crazy! ! ! I am a villain that the female lead can conquer! ! ! ! I am a most competent villain. The following is the villain's handbook: "Item 1: Remember - you are the villain." "Rule 2: Villains can't talk too much." "Principle 3: Villains must be ruthless." "Article 4: Remember - if the good guys are not happy, the bad guys will be happy." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.