I was reincarnated into an anime with an isekai theme?. (Novel)

The story is about Trần Hạo Nam, a normal guy who likes to watch anime, manga and light novels. One day, after returning home from the Anime Festival after a long tiring day, he went to sleep. Right after waking up, he found himself in a strange room. With his knowledge, he knew that he had entered another world. But what he didn't expect was that the world he entered was the world of the anime "I was reincarnated as the villainess of an Otome game. With my knowledge, I am determined to fight against the fate of a Bad ending". So right after realizing the truth that he had entered an Isekai anime with an Isekai theme, what would he do?