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.
Naruto would likely be excited. He loves his son so much that seeing different stories about Boruto would be like seeing different potential futures for him. He might even get some inspiration from the fanfiction to give Boruto some advice in real life.
The villagers would likely be in shock. Naruto is a beloved figure, but killing his own son would be a very controversial act. Some might turn against Naruto, believing he has gone too far. Others might understand his reasons if they knew the full story, but still struggle with the morality of it.
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.
He might be initially surprised. Naruto has always been a bit oblivious when it comes to romantic feelings. So, his first reaction could be shock, with his eyes widening and him stuttering a bit as he tries to process the new information.
Naruto would probably be his usual upbeat self. He might make a joke about the 'lemon' situation at first to lighten the mood. But when he realizes how serious it is for Hinata, he would become determined to fix it. Hinata, on the other hand, would likely be more reserved. She might initially withdraw a bit, feeling a bit hurt or embarrassed, but then she would gather her courage to face the situation head - on.
Most of the time. Fanfic authors usually take their canon relationship and expand on it. They might write about how Hinata's support during Naruto's toughest times, such as his battles and self - doubts, cements their bond as soul mates. It gives a more in - depth look at how two characters with different personalities can complement each other so well.