A prevalent theme is the exploration of their relationship in different scenarios. For example, in some fanfictions, the kisses might happen during a time of celebration after a great victory. This shows their joy and how they share their emotions with each other. Also, themes of protection often come up. A kiss can be a way for one to comfort the other when they are in danger or feeling vulnerable.
One common theme is loyalty. Their marriage in these fanfics often emphasizes their unwavering loyalty to each other. They are always there to protect one another, just like in the original story.
One possible plot could be a grand adventure where they team up to take on a powerful enemy that threatens the safety of their hometown. They could use their combined skills and the strong bond they share to overcome challenges.
I really like the fanfiction 'Our Married Life at Sea'. It details their daily life after getting married. It has a lot of cute and heartwarming moments, like when they share their dreams under the starry sky on the ship. It also shows how they face challenges together as a married couple in the pirate world.
One popular fem Luffy and Ace fanfiction might be 'Sisterly Bonds'. It delves into their relationship with a new perspective of Luffy being female. It shows how their interactions change and yet still hold the essence of their brotherly (in this case, sisterly) love in the original story. Another could be 'Fem Luffy's Adventure with Ace', which focuses on their adventures together with a unique take on fem Luffy's character development in relation to Ace.
Well, I've heard of a fanfiction where Ace and Luffy's relationship is explored in a very unique way. It's titled 'Love Beyond the Seas'. The kisses in this story are quite special as they are set against the backdrop of their adventures at sea. It shows how their relationship has grown over time and how these kisses are a natural progression of their deep - seated love for each other. However, different people may have different preferences when it comes to fanfictions, so it might be worth exploring a few to find the one that really suits you.
The popularity also stems from the fact that there are so many unexplored aspects of their relationship in the official story. Fanfiction allows writers to fill in those gaps and create stories that satisfy the fans' curiosity. For example, their early days together or how they would interact in different settings.
One good 'One Piece Ace x Luffy fanfiction' is 'Brothers in a New Light'. It explores their relationship in a different AU (alternate universe) where they face new challenges together. The story focuses on how their bond remains unbreakable even in the face of unexpected situations.
First, you need to really understand the characters of Luffy and Ace from the original One Piece. Think about how Luffy's character traits would be different or the same if she was female. For Ace, consider how his relationship with a female Luffy would develop. Then, come up with an interesting plot. It could be an adventure they go on together, or a situation where they have to face a common enemy. Also, don't forget to add some emotional depth to their relationship.