Metropolis: It Turns Out That I Am the Villain

Once I traveled through the deep sea, it turned out that I was the villain? What should I do if I traveled back in time to the novel I wrote and became the villain? Of course it's Gan! Even though he is the protagonist, what else can he do in the story he writes? Later I discovered that this world is not limited to the books I wrote, but since I have traveled through time, there is nothing wrong with the protagonist. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.