A third plot might be that Ran is investigating a mystery that is somehow related to Kaito Kid's next target. They cross paths and at first, are at odds. But as they dig deeper into the mystery together, they start to understand each other's motives and a bond forms. This could lead to a story full of twists and turns as they both try to achieve their goals while also dealing with their new - found connection.
One idea could be that Kaito Kid is on a heist and Ran accidentally gets involved. She initially mistakes him for a common thief but as she spends time with him during his escape, she realizes there's more to his actions. Maybe he's stealing something that was wrongfully taken from someone he's trying to help.
One great plot idea could be a team - up. Kaito Kid gets framed for a crime he didn't commit, and Conan has to help him clear his name while also trying to catch him in his thieving acts. Another could be a time - travel plot where they both end up in the past and have to work together to get back to their own time. Maybe they discover a common enemy from the past that is causing problems in the present as well.
A cool Kaito Kid crossover fanfiction idea is with the world of Harry Potter. Kaito Kid could try to steal a magical artifact from Hogwarts, like the Philosopher's Stone. He'd have to navigate through the magical defenses and deal with the wizards and witches. Also, a crossover with One Piece. He might target a Devil Fruit, which would put him in conflict with the Straw Hat Pirates. And a crossover with Pokémon. He could be after a rare Pokémon that has some special power, like Mewtwo.
A possible plot for 'Kaito Hunter x Hunter fanfiction' is that Kaito enters a special tournament in the Hunter x Hunter world. This tournament has rules and challenges that are different from the normal ones. He meets new and interesting characters during the tournament, some of whom become his friends and some his enemies. As he progresses through the tournament, he uncovers a conspiracy that is related to the very foundation of the Hunter x Hunter world. He then has to decide whether to expose it and risk his life or keep quiet and let the conspiracy continue.
One idea could be a female Kaito who uses her charm to outwit the police in a different way than the male Kaito. For example, she might use her femininity to create diversions. Another could be a story where she teams up with the original Kaito to pull off an elaborate heist that requires both their skills. Maybe she has a special ability like being able to blend into high - society events more easily as a female.
Ran's sense of justice can be pitted against Kaito Kid's Robin - Hood - like stealing. He might steal from the rich to give to the poor, but Ran still sees it as wrong in the eyes of the law. Their different outlooks on right and wrong can create a complex dynamic. As the story progresses, they might influence each other's views. Ran could start to see the grey areas in the law, and Kaito Kid might consider more legal ways to help people.
One plot idea could be that Kaito Kid steals a precious jewel that has some hidden secret related to Shinichi's past case. Conan, while trying to solve the mystery of the jewel, has to team up with Kaito Kid who has his own reasons for stealing it. Another idea is that Shinichi, in his Conan form, is invited to a magic show by Kaito Kid where Kaito Kid uses the show to set up a mystery that only Shinichi can solve. And a third idea could be that a new villain emerges who targets all three of them, forcing Kaito Kid, Shinichi (as Conan), and the Detective Conan gang to work together to defeat the villain.
In a fanfiction like this, a great plot could be that Shinichi and Kaito are in a relationship and Shinichi suddenly finds out he's pregnant. Kaito is initially shocked but then becomes super supportive. They could face challenges like how Shinichi's detective work might be affected. Also, they might have to deal with society's reactions as male pregnancy is not the norm. They could go on a journey to find a way to ensure Shinichi's and the baby's safety while also trying to figure out how this pregnancy came about in the first place, perhaps involving some villain's evil plan.
One idea could be a story where Death the Kid has to team up with a character from Soul Eater to face a new, powerful enemy that threatens the balance between the world of humans and the world of demons. They might start off not getting along due to their different personalities and ways of doing things, but as they face challenges together, they learn to respect each other and combine their strengths to defeat the foe.
Maybe in the fanfiction, Fem Gaara is sent to the Hidden Leaf Village for some diplomatic training. There, she meets Kid Naruto who is initially curious about her. They get into all sorts of adventures together, like exploring an old, forgotten part of the forest. Along the way, Naruto's positive attitude starts to melt Gaara's cold exterior and they begin to fall in love.
Perhaps Kaito Kid kidnaps a fan by mistake. He was aiming for someone else who looked similar, and this fan is just an ordinary person who happened to be in the wrong place at the wrong time. The fan could be really scared at first, but then as they interact with Kaito Kid, they start to see a different side of him. Kaito Kid might then have to figure out how to let the fan go without getting caught himself.