One possible plot could be that Naruto discovers Haku is still alive after some hidden jutsu was used on her. They fall in love gradually and get married. Then they face the challenges of rebuilding Haku's clan together while also dealing with the political unrest in the ninja villages.
One challenge could be acceptance from their respective villages. The Leaf village might be hesitant to fully accept Haku, given his past association with Zabuza. Similarly, the Hidden Mist might have reservations about Naruto, a Leaf ninja. Another challenge could be jealousy from other characters who might have had feelings for either Naruto or Haku. For example, some of Naruto's female friends in the Leaf village might not be happy about his marriage to Haku.
A Naruto and female Haku married fanfiction could entail a lot of things. It could start with how they first fell in love. Maybe it was during a joint mission where they saw the best in each other. Then it would involve their wedding, which could be a mix of Konoha and Hidden Mist traditions. After that, they'd have to deal with daily life. Naruto might come home late from training, and Haku would be there with a warm meal. They could also have adventures together, protecting the ninja world from new threats while also growing their relationship.
Yes, there are quite a few. You can find them on popular fanfiction websites like FanFiction.net or Archive of Our Own. Some focus on their relationship post - marriage, exploring how they adapt to living together and deal with the challenges in the ninja world as a couple.
One possibility could be a story where Naruto, after achieving peace in the ninja world, realizes his deep connection with Haku. They start to bond over their shared experiences of loneliness in the past. Haku, with his gentle and kind nature, helps Naruto in rebuilding the Hidden Mist village. Their marriage could be a symbol of the new alliance between the Leaf and the Mist, and they face challenges together like any married couple, such as cultural differences between the two villages.
In this fanfiction scenario, their relationship could develop in many interesting ways. Naruto, with his big heart, would likely help Haku open up more. Haku, being a gentle soul, could be a calming influence on Naruto. They might start by sharing their past traumas. Naruto could tell Haku about his lonely childhood, and Haku could share her experiences in the Hidden Mist. As they grow closer, they could learn new jutsu together, combining Naruto's Uzumaki bloodline abilities with Haku's ice techniques. Their marriage could also bring about a new understanding between Konoha and the remnants of the Hidden Mist's more peaceful factions.
The plot could involve an alternate universe where Naruto and fem Haku are from the same clan. They are arranged to be married to strengthen the clan's position. At first, they are hesitant, but as they spend time together, they fall in love. However, a dark force within the clan doesn't want this union to happen and tries to stop them. Naruto and Haku fight against this force, and in the end, they are victorious and get married, starting a new era for their clan.
Well, in some fanfiction ideas, Naruto might use some powerful jutsu. For example, he could discover a new form of the shadow clone jutsu that allows him to transfer life force. He clones himself multiple times and combines their life energy to bring Haku back. Another way could be through some kind of ancient forbidden jutsu he stumbles upon. Maybe it's a jutsu that requires a great sacrifice on his part, like giving up some of his own chakra permanently.
I'm not sure if there's a specific and widely - known 'Naruto x Haku pregnant fanfiction'. But it's very likely to exist given the creativity of fanfiction writers. They often take existing characters and put them in unexpected situations. A story about Haku being pregnant could involve all kinds of new plotlines, like dealing with the reactions of other characters in the Naruto world, or how Haku would handle the physical and emotional changes. It might also be a way to introduce new elements to the Naruto universe that were not present in the original series.
One consequence could be that Naruto is seen as a hero by some, but also as a rule - breaker by others. The ninja world has rules about bringing back the dead, and Naruto's actions might stir up controversy. Some might fear that this new ability of his could be misused. Haku, on the other hand, would have to adjust to a world that has changed since his death. He might face challenges in reconnecting with his old friends or finding his place in the new ninja world.