Typically, these fanfictions develop their plots by first establishing the Naruto - Sakura relationship as the base. Then, they introduce the 'harem' concept through various means. It could be that Naruto has a group of friends who are all in love with the idea of Naruto and Sakura being together. They start to form a sort of community around this relationship. As the story progresses, external threats or internal conflicts within the group can drive the plot forward. For instance, a threat to the village might make Naruto and his 'harem' of friends have to work together to protect Sakura and the village, which in turn deepens their relationships and the overall plot.
Often, they start by introducing the concept of a harem. For example, in some fanfictions, Naruto might suddenly find himself in a situation where multiple girls are interested in him. Then, the plot develops as he tries to understand his feelings for each of them and deal with the jealousy or competition among the girls.
In 'Naruto x Yaoi Harem' fanfictions, Naruto is often shown as a central figure around whom the harem revolves. His character may be more vulnerable in terms of his emotions towards the members of the harem. For example, he could be more hesitant or shy when it comes to dealing with the romantic feelings of the other male characters. Also, his growth as a character might be linked more closely to his experiences within the harem rather than just his ninja training.
The relationships in these fanfictions often develop through shared experiences. Maybe Sakura and the characters in her 'harem' have to fight together against a common enemy. This can bring them closer and make their feelings for her deeper. Also, some stories might have a more comical approach where misunderstandings lead to the development of relationships. For example, a character might misinterpret Sakura's kindness as romantic interest, and this starts a whole chain of events in the relationship development.
Typically, the development of relationships in Goku x Harem fanfics is quite complex. Goku, being rather naive in the matters of love in the original series, has to learn about emotions and relationships. The female characters in the harem usually bring out different sides of Goku. Some might be strong - willed and challenge him, which helps him grow not just as a fighter but also as a person in terms of emotional intelligence. They often go through various trials together, like facing powerful enemies or solving intergalactic mysteries, which deepens their relationships.
In Naruto x Ino harem fanfictions, Naruto's character might become more confident in his relationships. He has to handle multiple potential romances, which can make him grow. For Ino, she may become more assertive in her feelings for Naruto. For example, in some fanfictions, Naruto realizes his deeper feelings for Ino while also dealing with other girls interested in him. Ino, on the other hand, might have to compete in a way she didn't in the original story, which can bring out new aspects of her character like her determination and her ability to be vulnerable when it comes to love.
One way these fanfictions develop harem relationships is through the power dynamics. In both Naruto and DBZ, power is an important aspect. So, in a harem setting, the female characters might be attracted to Naruto or Goku because of their power. But it's not just about physical power. It could also be about their mental strength and leadership abilities. For example, Naruto's ability to inspire others or Goku's unwavering determination in the face of danger can make the female characters respect and fall in love with them. As the story progresses, the relationships are deepened as they face challenges together and support each other based on these power - related qualities.
In many Naruto massive harem fanfictions, the relationships develop through shared experiences. Naruto is constantly on missions, and the female characters might join him. During these missions, they face challenges together, which builds trust and deepens their relationships. Also, some fanfictions use the idea of Naruto's growing power and status in the village to attract the female characters, and then develop the relationships from there. For instance, as Naruto becomes more respected, the female characters see him in a new light and start to develop romantic feelings. Moreover, there could be some fanfictions where Naruto's unique personality traits, like his determination and kindness, are what initially draw the female characters to him, and then the relationships are developed through more personal interactions like conversations about their dreams and pasts.
Often, it starts with the medic characters treating Naruto's injuries. This close contact during treatment makes them see Naruto in a different light. They start to admire his strength and determination. As time goes by, feelings develop, and the harem aspect comes in as more than one medic has these feelings for Naruto.
Often, they start with Naruto being in some sort of situation where he catches the attention of the female characters. For example, his heroic deeds in battles or his kind heart in helping others. Then, the relationships gradually build as they go on adventures together or train side by side.
Another one is 'The Harem that Naruto and Sakura Built'. In this fanfiction, it shows how Naruto and Sakura gradually form a harem - like group around them. It's interesting as it not only focuses on their romantic relationships but also on their friendships and how they all work together to face challenges in the Naruto universe.