One great Detective Conan x Ran fanfiction is 'A New Adventure for Conan and Ran'. It shows a different side of their relationship during a mystery in an old castle. Another one could be 'Ran's Discovery' which delves into how Ran might find out Conan's true identity in a really unique way. There's also 'Conan and Ran: A Future Together' that speculates on their future relationship after Conan reveals his identity.
Well, 'The Day Ran Understood' is a really good fanfiction. In this one, Ran starts to piece together the clues about Conan being Shinichi in a very emotional journey. Then there's 'Conan's Protectiveness of Ran' which focuses on all the little ways Conan protects Ran during different cases, highlighting their deep bond. And 'Ran's Dream of Shinichi' is also interesting as it shows how Ran's dreams about Shinichi are intertwined with her interactions with Conan.
The popularity of Detective Conan x Ran fanfictions lies in the strong existing relationship between the two characters in the original series. Fans are always curious about how their relationship could develop further, like if Ran will finally figure out Conan's true identity. Also, the mystery and adventure elements in the original show can be carried over into the fanfictions in unique ways.
One interesting Detective Conan kidnapped fanfiction could be where Conan is kidnapped by a new, mysterious criminal organization. In this story, the kidnappers might be after his knowledge of the Black Organization. They could try to force him to reveal secrets, and Conan has to use his wits to escape while still in his shrunken form.
One common theme is the exploration of their hidden love. Since Shinichi is often in his Conan form, there's a lot of unspoken tension and longing between them in these fanfictions. Another theme is teamwork in solving mysteries. They often work together to crack cases, and this shows their strong bond.
Another idea is that they are at a masquerade ball. Shinichi is disguised as someone else, but Ran still senses his presence. They dance together and as the music reaches a crescendo, Shinichi reveals himself and kisses Ran. This would add an element of mystery and glamour to the story, as they are surrounded by other masked guests who are oblivious to their true identities.
One common plotline is that Shinichi finally reveals his identity to Ran completely and then they kiss. This is a big moment because in the original series, Shinichi's identity is a huge mystery for Ran most of the time.
One of the common themes is trust. Ran has to trust that Shinichi will come back to her, and Shinichi has to trust Ran with his secrets. Also, the theme of sacrifice comes up. For example, Shinichi might sacrifice his own safety or time to protect Ran. And of course, the theme of reunion is also there, as they are constantly in a state of being apart and then coming back together.
I also like 'Ran and Shinichi: Beyond the Mystery'. This fanfiction not only focuses on their relationship but also on how they grow as individuals. It shows Ran becoming more independent and Shinichi learning to balance his detective work with his personal life, all while their relationship blossoms.
One great Detective Conan Ran x Shinichi fan fiction is 'The Unspoken Bond'. It beautifully portrays the relationship between Ran and Shinichi, with lots of sweet and tense moments. Another is 'A New Beginning for Them' which takes a unique spin on their story and how they might finally get together.
Well, you could have an OC that is a childhood friend of Shinichi who has a photographic memory. This OC could recall small details from their past that end up being crucial in solving current cases. Or perhaps an OC who is an expert in a very specific field, like ancient languages, and Conan has to rely on this OC's knowledge when a case involves old inscriptions or manuscripts. Also, an OC who has a connection to the Black Organization, either as a former member trying to reform or someone unknowingly involved in their plans, could add a lot of drama to the fanfiction.
In a fanfiction, perhaps Shinichi and Ran are on a school trip. They get separated from the group and find themselves in a beautiful, secluded spot. Shinichi looks at Ran, realizes how much he loves her, and leans in for a gentle kiss. This simple yet profound moment could be a turning point in their relationship, with Ran finally getting the affection she has been longing for from Shinichi all this time.