One idea could be a story where Boruto and Himawari discover an old diary of Naruto's from his early days as a ninja. Hinata helps them understand the context and the values their father held. They then use those lessons to face a new threat in the village.
A fanfiction could center around Hinata training Himawari in some of the traditional Hyuga techniques. Naruto and Boruto watch and are inspired to have a friendly sparring match, which then turns into a family - wide competition to see who has improved the most in their respective skills.
One idea could be a story where Boruto and Himawari discover an old lemon tree in the Hidden Leaf Village. Naruto and Hinata then tell them about a legend that the tree was planted by the first Hokage. The kids decide to take care of the tree and throughout the process, they learn more about their family's history and the importance of nature in their village.
A fanfiction could explore Himawari starting to show signs of her own unique ninja abilities, and Naruto and Hinata trying to figure out the best way to help her develop them. Maybe she has an ability that neither of them has seen before, which causes some confusion and also excitement in the family.
Well, it could be a story centered around a festival in Konoha. Naruto and Hinata are preparing for the festival, and Boruto and Himawari are super excited. But then some strange things start to happen. Mysterious ninjas appear and seem to be up to no good. Boruto and Himawari get caught up in the mystery, and with the help of Naruto and Hinata, they figure out that these ninjas are actually from a far - off land and were just lost. In the process, the family bond gets even stronger.
A fanfiction could revolve around a mission. Naruto is away on a long - term mission, and Himawari, who idolizes Female Sasuke, gets the chance to go on a small local mission with her. Female Sasuke teaches Himawari some unique ninja skills. When Naruto returns, he is surprised at how much his daughter has grown under Female Sasuke's tutelage, and this also brings the three closer together in an unexpected way.
Websites like FanFiction.net and Archive of Our Own (AO3) are great places to start. They have a large collection of fanfics related to Naruto and his family.
There are many fanfics that explore the relationship between Naruto and Hinata further. Some might focus on their daily family life with Boruto and Himawari, like how they deal with Boruto's rebellious phase while still maintaining a loving family environment.
One idea could be to focus on their anticipation and preparation for the baby. They might discuss names, decorate the nursery, and Hinata could be shown getting advice from her family. Naruto, on the other hand, would be excited but also a bit nervous about becoming a father.
How about a twist where Hinata was secretly trained by an unknown master all along? And this training was to prepare her for a great prophecy that involves Boruto and Himawari. When the time comes, she reveals her new and unexpected skills to save her family.
Naruto and Hinata's relationship could grow as they face parenting challenges together. They would support each other more deeply, and their love would be even more evident to Boruto and Himawari. Boruto might start to understand his father better and respect him more as he sees how hard Naruto works for the family and the village. Himawari would continue to be the sweet, loving daughter, and her bond with Hinata would strengthen as Hinata teaches her more about being a kunoichi. And Boruto and Himawari's relationship as siblings would become closer as they go through various adventures together.
Let's say a traveling merchant brings a rare lemon that has special properties. Boruto is curious and wants to study it. Himawari tags along. Naruto and Hinata are initially worried but then support their children's inquisitiveness. The lemon could be the key to unlocking a new power or it could lead them to a new adventure outside the village, with the family having to rely on each other in unfamiliar situations.