One great 'Naruto grown up fanfic' is 'The New Era of Naruto'. It shows Naruto as a mature Hokage, dealing with complex political situations and new threats to the village. Another one could be 'Naruto: The Grown-Up Adventures' which focuses on his relationships with his old friends as they all have grown and changed.
Definitely Naruto and his friends like Shikamaru. Shikamaru, being the smart strategist, often plays a role in helping Naruto make important decisions as an adult in fanfiction. Also, characters like Kakashi might still be around in some fanfictions, acting as a mentor or an advisor to Naruto in his adult leadership role. And of course, the new generation of shinobi such as Boruto may also be included, showing the relationship between Naruto as a father and his son.
Another idea is that all the characters are now parents themselves. They have to balance their work at Monsters Inc with raising their own little monsters. It could show how they use their experiences as scared kids or scarers to be better parents.
One idea could be that Anya and Damian grow up and both enter the world of international diplomacy. Anya, with her telepathic abilities still somewhat intact, has an edge in understanding the true intentions of other diplomats. Damian, having grown into a confident and intelligent young man, works alongside Anya to solve international crises. They start off as rivals in this new world but gradually realize their feelings for each other as they face challenges together.
In 'Naruto grown up fanfic', Naruto is often shown as more level - headed. For example, he might be calmer in tense situations compared to his younger self. He's also depicted as a strong leader, guiding the village with wisdom.
In a 'naruto and hinata grown up fanfiction', perhaps they go on adventures outside of the village. Naruto has always been curious about the world, and now with Hinata by his side, they explore different lands. Along the way, they meet new friends and foes, and Hinata's gentle yet strong nature helps them out of many difficult situations.
One interesting Naruto grown up fanfiction could be about Naruto becoming a great Hokage and how he manages international relations. Another might focus on his family life with Hinata and how they raise their children in a post - war Konoha.
This is a wuxia novel. The protagonist grew up in a small town and had seven or eight friends. Each of them had different abilities. There was also a girl in the story who had known each other since childhood, and the protagonist had many emotional entanglements with her. I hope you like my recommendation. Muah ~
There is a fanfic called 'Grown - up Spike: The Dragon's New Role'. In this story, Spike has to take on important responsibilities in Ponyville as he grows up. He helps with various community projects and also deals with some old foes in new ways. It's quite an engaging read as it combines elements of growth, friendship, and adventure.
One common theme is friendship evolution. As they grow up, their friendships change and become more complex. Another theme is career and life choices, like what each Crusader decides to do with their lives based on their cutie marks.