One possible plot could be that Luffy and Hancock get married and start a family. Their family could then embark on adventures together, with their children inheriting some of their unique abilities. For example, their son might have Luffy's rubber powers and Hancock's beauty - related abilities, and they could use these to protect their island or go on treasure hunts.
Well, one possible plot could be that after many adventures together, Luffy realizes his deep feelings for Hancock. They might have a big wedding on Amazon Lily with all of Luffy's crewmates attending. Hancock would be overjoyed to finally marry the man she loves, and Luffy would be happy in his own simple way, excited for the new chapter in their relationship and the feasting that would come with the celebration.
Well, one possible plot could be that during their adventures, Luffy constantly protects Hancock from various threats. As he does this selflessly, Hancock starts to see a different side of him. Luffy, in turn, begins to notice Hancock's kindness towards his crew. This mutual understanding and respect gradually turn into love.
One interesting character could be a mysterious figure from Luffy's past who resurfaces and has a connection to Hancock's family. This character could bring a new level of mystery and danger to the family. Also, a young protege of Luffy and Hancock's family, someone they take under their wing. This character could learn from them and grow, adding a new dimension to the family story. And the pet of the family, perhaps a small sea creature with some special abilities, could also be a fun and endearing character in the fanfiction.
A plot could involve a magical or cursed item. For example, a necklace that when worn, makes the wearer fall in love with the first person they see. Hancock wears it by mistake and sees Luffy, leading to a kiss. Then there's the idea of a time - travel plot. Hancock goes back in time and meets a younger Luffy. As she gets to know him in this different context, their relationship evolves and they share a kiss. There are so many directions a fanfiction writer can take with these two characters when it comes to a kiss - related plot.
One possible plot twist could be that Hancock has to hide her pregnancy from the outside world for the safety of Luffy and their unborn child. Maybe there are enemies who would target them if they knew. Another could be that Luffy has some strange reaction to the news of becoming a father, like initially being really confused but then growing into the role in an unexpected way.
In this fanfiction plot, the pregnancy could lead to a new adventure. Luffy and Hancock might go on a journey to find a safe place for their baby to be born. Along the way, they encounter different islands and people. Hancock's knowledge of the Grand Line and her skills, combined with Luffy's strength and determination, help them overcome various obstacles. And as the pregnancy progresses, their bond grows stronger, and they learn more about each other and themselves in this new situation.
One possible plot could be that Hancock's island is in danger from a new and powerful enemy. Luffy, being the heroic type, comes to her aid. Along the way, they discover a new type of Devil Fruit power that they have to figure out how to deal with. Luffy's simple - minded yet determined approach and Hancock's pride and strength would make for an interesting dynamic as they face this new threat together.
One possible plot idea could be that Hancock discovers she is pregnant with Luffy's baby. This could cause a stir in Amazon Lily as they deal with the idea of their empress having a child with an outsider. Meanwhile, Luffy might be oblivious at first, still on his adventures, until the news reaches him and he has to figure out how to be a father while still pursuing his dreams of becoming Pirate King.
In a 'luffy x hancock high school fanfic', the plot might involve Luffy joining the school's sports team and Hancock being the cheerleader. They start off as strangers but as they interact more during school events, they discover they have a lot in common and start to fall for each other. Luffy's goofy nature and Hancock's strong - willed personality create an interesting dynamic.
In fanfiction, their life could be full of adventures. Luffy would still be eager to explore new islands, and Hancock would support him with her powerful abilities. They might have a home on Amazon Lily where Luffy could visit between his voyages. Hancock would also introduce Luffy to the unique culture of her people, and Luffy would share his tales of the Grand Line with the Kuja tribe.