One plot idea could be that Anna and Kristoff get into a big argument over how to handle a new threat to Arendelle. This causes a rift between them, but as they both separately try to solve the problem, they realize they need each other. Another could be a story where they go on a journey to a far - off land and discover a new magic that has an unexpected impact on their relationship. Maybe they find a magical flower that can show them their future together, but it also reveals some insecurities they both have.
Well, it could be that there is a strange illness spreading in Arendelle that only Anna seems to be immune to. Kristoff is worried sick about her and tries to keep her safe while also finding a cure. As they search for answers, they come across an old hermit who tells them that the key to the cure lies in a long - lost love story from Arendelle's past. They then have to piece together the story while also dealing with their own relationship and the growing panic in the kingdom.
One plot idea could be that Anna and Kristoff get lost in a magical forest on their way back from a diplomatic mission. They have to rely on each other and their skills to find their way out while also facing strange creatures. Another could be a story where they have an argument over how to handle Elsa's new ice - related discovery, and it tests their relationship. Maybe a third idea is that Kristoff discovers a long - lost relative who doesn't approve of his relationship with Anna, and they have to work through that together.
A plot could involve Anna and Kristoff having to deal with a diplomatic issue between Arendelle and another kingdom. As a married couple, they represent Arendelle in negotiations, and their relationship is tested as they face different political views. They also have to balance their royal duties with their own personal relationship.
One possible scenario could be that they share a kiss after a dangerous adventure. Maybe they were facing a powerful snow monster and Kristoff saved Anna. In the heat of the moment, filled with relief and newfound admiration, they kiss. Another could be during a celebration in Arendelle. After a successful harvest or a new alliance, the joy in the air leads to a spontaneous kiss between them.
One great fanfiction could be where Anna and Kristoff's baby has a special connection to the magic of Arendelle. Maybe the baby can communicate with the spirits of the forest like Elsa. Another story might focus on the challenges of raising a baby in a kingdom with so much history and responsibility.
One idea could be that Elsa and Anna discover a hidden magical realm within Arendelle. They meet new magical creatures there and have to work together to solve a problem that threatens both this new realm and Arendelle. For example, a dark magic is spreading and only Elsa's ice powers combined with Anna's courage can stop it.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of Frozen - related fanfictions, including those about Anna and Kristoff. Another place could be FanFiction.net, which also has a wide range of stories. Some Tumblr blogs dedicated to Frozen fan works might also be a good source. Just search for tags related to Anna, Kristoff, and lemon (but make sure it's appropriate content as the term 'lemon' can sometimes be misused).
Well, one thing that could happen is a grand celebration in Arendelle. All the people would come out to see their beloved princess Anna marry Kristoff. There would be ice sculptures everywhere as a nod to Elsa's powers, and the fjords would be filled with the sounds of music and laughter. The ceremony could be held in the castle courtyard, with Elsa using her magic to create a beautiful ice arch for them to stand under as they exchange vows.
One plot idea could be that Hans' true motives are revealed to be part of a larger scheme to take over Arendelle by using Anna as a hostage. Another could be that Anna manages to outwit Hans during the kidnapping through her kindness and understanding, making Hans question his own actions. Maybe in the fanfiction, Kristoff and Sven come to the rescue and there's an epic showdown in the mountains.
One plot idea could be that Anna discovers a new magical power within herself and Elsa helps her learn to control it. This could involve a journey through the Enchanted Forest where they face various challenges together and their bond grows stronger as a result. Another idea is a time - travel plot where they go back in time to prevent a past event that had a negative impact on their relationship. They could also face a new villain who is specifically targeting their sisterly bond, forcing them to work together to defeat the foe.
One plot idea could be them preparing for the baby. They might face challenges like finding a suitable place to raise the child in Arendelle. Kristoff could be worried about how to be a good father, while Anna is excited to start a family. They could also have some cute moments like choosing baby names together.