A Villain's Journey: The Tyrant Dragon Emperor

{This is my first novel sorry if I make some mistakes I will try my best to improve and give you all some nice reading experience} Damien, a normal teenager gets himself transmigrated into the world of a novel as a villain. Yup same transmigration drama. He is transmigrated into the body of one of the major antagonist and the new king of dragons in the middle of the plot. Now what should he do? Facing the ridiculously overpowered protagonist with system what could he do without any? "Fuck I don't care anymore let's just take his all opportunities away" His fiancee, the princess of one of the strongest human kingdom is already in love with the protagonist. Fuck let's destroy that country! His little sister also fell in love with the protagonist. Disown her! Fuck the humans let's join hands with Demons and conquer the whole world. Let's watch the journey of the wise dragon turning into a Tyrant to conquer the world.