In a Luffy x Nami Lemon New World fanfiction, there could be a situation where Nami is kidnapped by a group who wants to use her knowledge of the New World and the lemons (maybe there are special lemons with unique properties there). Luffy, being the fearless captain, sets out on a solo mission to rescue her. Along the way, he meets some old friends and new allies. When he finally reaches Nami, they both realize their feelings for each other have grown even stronger during this ordeal.
In a Luffy x Nami Lemon New World fanfiction, Luffy could develop his ability to understand Nami's more complex emotions. The lemons could be a symbol of something precious to Nami, and Luffy has to respect and protect that. He might start to see Nami not just as a crewmate but also as someone he has deep feelings for. Nami could develop her sense of adventure even more. She might be initially cautious about the lemons in the New World, but as she explores more with Luffy, she becomes bolder. Their characters could also grow together as they face new enemies in the New World who are after the lemons. This would test their loyalty to each other and the crew, and they would come out stronger as individuals and as a couple (in a platonic or romantic sense depending on the direction of the fanfiction).
One possible plot could be that during a journey on the Grand Line, Nami and Luffy find themselves in a strange and beautiful island. There, they start to discover new feelings for each other. Nami might be initially hesitant due to her past experiences and her focus on the treasure, but Luffy's pure heart and his unwavering belief in their friendship gradually make her open up. And they could go through various adventures on the island together, strengthening their bond in a more romantic way.
One interesting theme could be the exploration of loyalty in a different context. In the original story, Luffy and Nami have a strong bond of loyalty as crewmates. But in a fanfic, this loyalty could transform into a more romantic and exclusive loyalty towards each other. Another theme might be the discovery of self - through their relationship. Nami could learn to trust more deeply, and Luffy could become more aware of his own emotions.
Well, in this 'luffy x nami nightmare fanfiction', it might depict a scenario where Luffy and Nami are in a nightmare world. It could be that they have to overcome their fears. For example, Luffy might have to deal with the fear of losing his crew, and Nami could be facing her past traumas in this nightmare setting. And they would rely on each other to get out of this difficult situation. It's all speculation as fanfictions can vary greatly in their content.
Some plotlines in Luffy and Nami lemon fanfiction include Luffy and Nami getting lost in a magical forest. In this forest, they encounter strange creatures and have to find their way out. During this time, Nami discovers a new side of Luffy's leadership. Another could be that a new crew member joins who causes some jealousy issues between Luffy and Nami. They then have to sort out their feelings. Also, there could be a story where Nami gets a serious illness and Luffy is determined to find a cure for her no matter what, showing his loyalty and deep care for her.
I'm not really aware of which 'luffy and nami lemon fanfics' are particularly popular. Fanfic popularity can be quite subjective and spread across different fanfic platforms. You might need to search on popular One Piece fanfic websites and check the reviews or ratings to find out.
Well, in a high school fanfic of Luffy and Nami, their friendship (or potential romance) could develop in various ways. Luffy might drag Nami into his zany schemes, such as organizing a school - wide pirate - themed event. Nami would reluctantly go along, but then find herself enjoying it more than she thought. And as they spend more time together, they start to understand each other better. Luffy would learn about Nami's dreams and support her, while Nami would be there to keep Luffy in line, at least a little bit.
A fanfiction I really like is 'The Great Pirate Alliance'. In this, Luffy, Nami and Hancock form an alliance that is not just about fighting together. It also explores their personal relationships. Luffy's simple yet strong emotions towards his friends, Nami's loyalty to the crew which extends to Hancock as she becomes more involved, and Hancock's love for Luffy which starts to change into a more complex and deep friendship as she spends more time with Nami and the rest of the Straw Hats.
Their dynamic might change as they become more reliant on each other. Luffy has always trusted Nami's navigation, but over the two years, he might start to seek her advice in other matters too. Nami, on the other hand, may become more confident in Luffy's leadership and be more willing to follow his crazy plans without hesitation.