First, understand the characters well. Naruto is known for his determination and big heart, and Sakura has her own growth from a girl with a crush to a strong kunoichi. Keep their personalities intact when creating the harem situation. For example, Naruto would still be the one to never give up on his friends and Sakura would still be intelligent and capable in combat.
The 'naruto x sakura harem fanfiction' usually has a focus on relationships. It shows how love and friendship can co - exist in a harem setting. There are often emotional moments between the characters. The fanfictions may also include some alternate universe settings. For example, a world where Naruto and Sakura are in a different social status, which then affects how the harem is formed and how the relationships develop. It also often has a sense of wish - fulfillment for fans who want to see Naruto and Sakura in more complex relationship scenarios.
One popular theme is friendship. Sakura's relationships with different characters in the harem - like situation are often explored in terms of how they support and care for each other. Another is adventure, where they all go on quests together.
Definitely Sasuke. Their relationship has always been complex and full of unspoken feelings. Naruto is also a strong contender as he has always cared for Sakura deeply. Rock Lee might be in the harem too. His admiration for Sakura has been quite obvious throughout the series. And perhaps Kiba, who could see Sakura in a new light during the time - travel events. Also, an older or more experienced version of a minor character from a different clan might be attracted to Sakura's growing power.
Another one is 'Naruto's Harem Adventure'. This fanfiction is quite unique as it not only focuses on the relationship between Naruto, Sakura, and Ino but also brings in other elements from the Naruto universe. It shows how the harem dynamic affects Naruto's growth as a ninja and his relationships with his friends and the village.
One popular storyline is the growth of Naruto's relationships with multiple characters in a harem setting. For example, his bond with Sakura could develop in unique ways. Maybe they go on adventures together and Naruto's kindness and strength make other characters fall for him too. This often includes characters like Hinata, Ino, etc. in the harem mix. The stories might focus on how Naruto balances his feelings for Sakura among all these new relationships.
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.
One popular 'Naruto Sakura harem fanfiction' might be those where various characters from the Naruto universe are vying for Sakura's attention. For example, some stories could have Naruto, Sasuke, and other male characters in a situation where they all have feelings for Sakura at the same time. It often involves a lot of drama and different interpretations of the characters' relationships compared to the original story.
Yes, there are quite a few. You can find them on some fanfiction websites like FanFiction.net or Archive of Our Own. Just search for the relevant tags and you'll be presented with a variety of stories in this theme.