There could be. Fanfic writers love to explore different relationships and scenarios that aren't part of the original story. Given the popularity of both the Persona series (where Nanako Dojima is from) and Naruto, someone might have combined the two in a creative way in a fanfic.
It could be about Nanako's journey in falling in love with Naruto. Maybe she first sees him in some kind of crossover event between their worlds and is immediately smitten by his determination and strength.
A 'adachi x nanako fanfic' could potentially explore the relationship between Adachi and Nanako. It might focus on their interactions, how they support each other, and the development of their friendship or a possible romantic connection. Maybe it shows how they grow together through shared experiences in their fictional world.
Friendship - turned - love is also likely. They start as friends and then develop deeper feelings. Another common theme might be growth. They both grow as individuals while being in a relationship with each other, like learning to be more confident or understanding.
The plot could be about Adachi and Nanako meeting by chance in a small town. They start off as strangers but gradually become friends as they discover they have common interests, like a love for art. As they spend more time together, they face some challenges in the town, such as a local bully or a problem with a community project. Through working together to solve these problems, their relationship blossoms.
I'm not sure specifically which 'nanako x yu fanfic' stories are popular. You could try searching on fanfiction platforms like Archive of Our Own. There might be a variety of stories there, perhaps some cute romantic ones where they go on adventures together or help each other through difficult times.
In Naruto fanfic, love and competition often go hand in hand. For example, characters might compete for someone's love. Naruto himself could be in a situation where he has to compete with another character, like Sasuke perhaps, for Sakura's love. This adds an interesting layer of drama to the story.
One common theme is friendship development. Writers often explore how Yu and Nanako's friendship grows deeper over time. It could be through shared experiences like going to school events together or helping each other with personal problems.
The popularity of 'naruto is a love child fanfic' likely depends on various factors. There are many different types of fanfics in the Naruto community, and this concept might appeal to those who are interested in family - centric or romantic plotlines within the Naruto world. But compared to more common fanfic themes like battles or power - ups, it may not be as widely popular. However, it could gain a following among fans who are looking for something new and different to read within the Naruto fanfic realm.
One idea could be that Naruto gets lost in Iwagakure's territory during a mission. Kurotsuchi finds him. At first, she's suspicious of him, but Naruto's friendly nature wins her over. As they try to find a way for Naruto to get back to Konoha, they have to rely on each other. This mutual dependence could lead to the start of their love story.