One idea could be a crossover where Naruto and Hinata somehow end up in the world of Inuyasha. Maybe they are on a mission and a strange portal sucks them in. Once there, they meet Inuyasha and his gang. Hinata could befriend Kagome due to their similar kind - hearted natures. Naruto, on the other hand, might get into some friendly sparring with Inuyasha over differences in their fighting styles.
Another concept could be a story where Inuyasha is brought to the Naruto universe. He meets Naruto and Hinata and is quite confused by their world at first. Hinata might be a bit shy around Inuyasha because of his rough exterior, but Naruto would be excited to show him around. They could all team up to fight a new enemy that has emerged in the Naruto world which has some similarities to the demons Inuyasha is used to fighting.
One idea could be a story where Naruto and Hinata are on a mission together, and Tenten joins them later. Maybe they encounter a powerful enemy that requires all of their skills combined. Tenten's weaponry skills, Hinata's Byakugan and Naruto's Nine - Tails chakra could be used in a creative way to defeat the foe.
One idea could be a story where Naruto, Hinata and Hanabi go on a mission together. They face a powerful enemy and have to rely on each other's unique skills. Naruto uses his Rasengan, Hinata her Byakugan and gentle fist techniques, and Hanabi shows off her improved skills compared to her sister. Through this adventure, they grow closer as friends and Naruto might start to see Hanabi in a different light too, while still being in love with Hinata.
Another fanfiction concept could be set in a post - war scenario. Gaara, Naruto and Hinata are all working towards rebuilding their respective villages. They come together to share ideas and resources. Naruto's enthusiasm and leadership skills, Hinata's kind heart and Gaara's wisdom in governance combine to create a unique bond. They might face challenges like distrust from some villagers who are still adjusting to the new peace, but together they overcome these difficulties and inspire others to work towards a better future.
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.
One idea could be a story where Sasuke and Naruto have to team up again for a dangerous mission, and Hinata and Sakura also join in. During the mission, Hinata might use her Byakugan to detect hidden enemies, while Sakura uses her medical and combat skills to support the team. And Sasuke and Naruto could have some deep conversations about their past and future, like they did in the original series.
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.
In a fanfic, there could be a mystery in Konoha where strange things are happening around the lemon groves. Naruto, Hinata, and Sakura are assigned to investigate. As they dig deeper, they discover that an old enemy is using the lemon groves as a cover for their evil plan. Naruto uses his strength, Hinata her Byakugan, and Sakura her intelligence to solve the mystery and save the village.
A fanfiction could be set in a post - war scenario. Sasuke is trying to atone for his past actions and Sakura is by his side to support him. Meanwhile, Gaara, as the Kazekage, invites them to the Sand Village. Hinata also comes along. Here, they all train together. Hinata's gentle nature starts to soften Gaara's tough exterior and Sasuke and Sakura grow closer as they see the potential for a new, peaceful future. This could lead to new relationships forming between the four characters.
Perhaps in the fanfiction, Hinata wears a micro bikini for a special festival in the Hidden Leaf Village. Naruto is really excited to see her in it. They participate in the festival games together and Hinata's new look makes Naruto see her in a different light, more as a strong and confident woman.
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.