One common theme could be the deep bond of friendship between them. Even in non - inappropriate fanfictions, their relationship is often a central focus. For example, how Shanks' sacrifice of his arm to save Luffy led to Luffy's unwavering determination to become a great pirate like him.
They could have heart - to - heart conversations. For example, Shanks could share his past adventures and the lessons he learned from them with Luffy. This would help Luffy gain more wisdom and also deepen their connection.
I'm not really into lemon fanfictions as they often deviate from the original spirit of 'One Piece'. However, if you want to find some well - written fanfictions about Luffy and Shanks' relationship in general, you can check out some popular fanfiction websites like Archive of Our Own. There might be some great stories that focus on their bond, like how Shanks influenced Luffy's journey to become the Pirate King.
One idea could be that Shanks teaches Luffy a special, secret Haki technique that only they share. This would give Luffy an edge in his future battles and also strengthen their bond.
When Luffy meets Shanks again in the fanfiction, it might change the story in several ways. For one, Luffy could get new directions or insights from Shanks. This could lead the Straw Hat crew to a new island or a new adventure. Also, Luffy's crew might gain new allies through Shanks' connections. And Luffy's resolve to become the Pirate King could be strengthened even more, which would drive the story forward with more determination.
In the fanfiction, Luffy might show Shanks how much he has grown. He could display his new Haki abilities and his stronger crew. Shanks would be proud of Luffy's progress.
Luffy and Nami could be in a situation where a lemon - themed pirate crew attacks them. Luffy is ready to fight while Nami tries to negotiate. But as they interact more with this strange crew, they find out that the lemons they carry have a secret power that could help Luffy become stronger. This discovery changes the dynamic of their relationship as they work together to get this power for Luffy.
One possible fanfiction could be where Luffy and Nami are on an island during a strange weather phenomenon. Nami is trying to figure out how to navigate through it while Luffy is just excited about the adventure. The 'lemon' aspect could be a special lemon - scented flower on the island that has some magical property that affects their emotions and brings them closer in an unexpected way.
They could start with a big hug. Then Shanks might tease Luffy about his still - crazy appetite. Luffy, in turn, could show off his new crew members to Shanks.
To stay true to the One Piece spirit, the fanfiction should keep Luffy's core values. Luffy is always about freedom, adventure, and loyalty to his crew. So in the lemon - themed fanfiction, his actions should still be guided by these principles. For example, if he's after a lemon - related treasure, it should be because it represents freedom in some way, like freeing a captured village that depends on the lemon trade. His relationships with his crewmates should also remain the same, with lots of banter and support.