If You Do As I Say, You Can Become the Male Lead!

I got possessed into my favorite web novel, <That Summer's Film>. Usually, people who get possessed in novels do their best to stick to the original story, but not me. “Eun-ho, listen carefully. I’m going to make you the main guy.” Now that it’s happened, forget the original story—I’m going to change things however I want. My favorite, the secondary male lead, is going to become the main guy! But then. “Why are you doing this to me?” My secondary male lead, “Let’s see how things go from now on, Moon Ye-rim.” Wait, my main guy is… “Nothing else… I just came because I wanted to see you.” Why is he showing interest in me? I was just trying to help the secondary ...