One popular luffy x usopp fanfiction might be 'The Unbreakable Bond'. It delves into their friendship in a more in - depth way, showing how they support each other during tough times on their adventures. Another could be 'Shared Dreams', which focuses on their common goals and how they inspire one another to reach for the stars. There's also 'Adventure Anew' that takes their relationship and throws them into new and exciting scenarios.
To write a luffy x usopp fanfiction, you need to study their personalities thoroughly. Luffy is the fearless leader type, always ready for action, and Usopp is the inventor and storyteller. You could start by choosing a theme, say, 'overcoming fear'. Have Usopp face a really scary situation and Luffy be there to encourage him. Develop their dialogue in a way that reflects their unique voices. Luffy might say something like 'Don't worry, Usopp! We'll get through this!' Also, create a plot that has a clear beginning, middle, and end. Maybe they are trying to save a village on the island from a strange monster.
I recommend "The Little Dainty Wife of the Reborn Era." This modern romance novel met the requirements of the title. The female lead grew up with Ace and Luffy, and the male lead was a manly man. There were four completed copies of this book, and the quality was guaranteed, so it could be called a finished novel. I hope you like this fairy's recommendation. Muah ~😗