To rewrite a pc visual novel, start with the theme. Maybe you want to change it from a light - hearted adventure to a more serious drama. Then, focus on the characters' development. Give them new goals, fears, or desires. For instance, if a character was previously only interested in money, make them realize the importance of friendship and change their actions accordingly. As for the settings, you can completely transform them. If it was set in a modern city, move it to a historical or a fantasy world. This will open up a whole new range of possibilities for the story.
First, analyze the existing plot and characters. Then, you can change the storyline by adding new twists, like introducing unexpected events or new relationships. For example, if the original visual novel is about a love story in a high school, you can add a mystery element such as a hidden family secret that affects the relationship between the characters. Also, you can rewrite the dialogues to make them more engaging and natural. Replace dull lines with witty and emotional exchanges. Another important aspect is to review the visual elements and see if they can be adjusted to better fit the new narrative.