One plot idea could be that they have a secret detective - phantom thief relationship even after getting married. Kaito might still pull off some heists while Aoko, as a detective, tries to figure out if it's him. Another idea is that they go on a honeymoon adventure where they encounter some mystery that they have to solve together. Maybe they find a lost treasure that has a connection to their families.
One plot idea could be that Kaito decides to give up his life as a phantom thief after getting married. But an old enemy resurfaces, threatening their new - found happiness. So, they have to work together to defeat the enemy. Another idea is that they go on a honeymoon that turns into an adventure when Kaito stumbles upon a mystery related to an ancient artifact. And Aoko helps him solve it using her wits.
One possible plot could be that they face unexpected pregnancy and have to deal with the reactions of their families and friends.
For Kaito, you can show his development from a carefree phantom thief to a more responsible husband. Maybe he starts to think twice about his risky stunts because he doesn't want to put Aoko in danger. For Aoko, her development could be from being just a detective focused on catching Kaito Kid to a more understanding and loving wife. She might start to see the good in Kaito's actions, even if they were illegal before.
In a fanfiction of their marriage, it might show how their relationship changes. Kaito, who was always so elusive, would become more open and affectionate. Aoko would be both excited and a bit nervous about this new phase. They could have a wedding where Kaito uses his magic skills to make the whole event extraordinary. For example, the flowers could magically change colors during the ceremony. And their married life could be filled with little mysteries and fun, like Kaito creating magic shows just for Aoko at home.
Another theme could be the element of surprise. Maybe Kaito is trying to keep his identity a secret from Aoko, and the kiss happens in a moment when she least expects it, which then adds a whole new layer of drama to their relationship. It can also be a theme of love conquering all, especially if there are obstacles in their relationship, like their different personalities or family backgrounds, and the kiss is a symbol that they can overcome those things.
There might be such fanfiction out there. Fanfiction writers often come up with various scenarios for their favorite characters. However, it could be a bit hard to find just by randomly looking. You may need to use the right search terms on different platforms. For example, search for the names 'Kaito' and 'Aoko' along with the keyword 'pregnancy' on the relevant fanfiction platforms. If it exists, it may be among the results.
There are definitely some 'Kaito and Aoko kiss fanfiction' pieces out there. Some authors are really creative in how they bring these two characters together for that moment. They might add in some interesting plot twists, like a dangerous situation that makes the kiss even more intense, or they could write it in a more light - hearted and comical way, where it's a bit of a clumsy or unexpected kiss.
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.
One common theme is the secret identity aspect. Kaito Kid's double life often adds an element of mystery and tension to the relationship, which can be a big part of the fanfiction. Another is the unrequited love or the slow - burn romance that finally leads to the kiss.
One great Kaito Kid x Aoko fanfiction is 'The Hidden Feelings'. It delves into the unspoken emotions between them. It has some really sweet moments where Kaito's charm and Aoko's feisty nature play off each other in an endearing way.