One popular idea could be exploring their friendship in different settings, like them traveling together. Another could be a story where they support each other through difficult times in their careers. And they could also have a story where they start a new business together.
To start a nana x hachi fanfic, begin by brainstorming different scenarios. Think about the kind of relationship you want to portray between them, whether it's more of a sisterly bond or a deeper emotional connection. After that, create an outline that includes the beginning, middle, and end of your story. For example, start with an interesting encounter, then build up the tension or conflict in the middle, and finally resolve it at the end.
Definitely. The story of Hachi originated from a true event. It showcases the remarkable devotion and unwavering love a dog can have for its human companion.