One possibility for a Naruto and Itachi best friends fanfic could be that Itachi, instead of massacring his clan, finds a way to resolve the conflict with the help of Naruto. Naruto, with his unwavering belief in friendship, could convince the Uchiha clan and the village elders to come to a peaceful agreement. Itachi, seeing Naruto's positive influence, becomes his close friend. They could then train together, with Itachi teaching Naruto some of the more advanced Uchiha jutsu, and Naruto in turn sharing his own unique ninja way with Itachi.
The exploration of characters in new ways. For instance, seeing Naruto in a relationship that's not the typical romantic one from the original series. It can add depth to his character and show different sides of him. Also, the way the author plays with the 'friends with benefits' concept within the Naruto world's rules and culture can be really fascinating.
One popular 'Naruto Friends with Benefits Fanfic' could be 'Naruto's Unlikely Bond'. It explores an interesting relationship dynamic between Naruto and another character. It delves into how their friendship takes on a different level while still maintaining the essence of the Naruto universe. However, fanfics can vary greatly in quality, so it's also important to look at reviews from other readers to ensure it meets your expectations.
A possible plot is that Gaara is having trouble controlling his inner demon again. Naruto, having experienced similar issues, offers to help him. They go on a journey to find a way to calm Gaara's inner turmoil. During this journey, they encounter various challenges and also meet old friends and foes. Through shared hardships and Naruto's constant encouragement, Gaara finally gains better control. Their friendship is strengthened through this life - changing experience.
In the fanfic, Gaara and Naruto meet by chance in the Hidden Leaf Village. Naruto is immediately intrigued by Gaara's silent and brooding nature. He tries to befriend him, inviting Gaara to eat ramen with him. At first, Gaara is hesitant, but Naruto's warm smile makes him give in. As they share a bowl of ramen, they start to talk about their dreams and fears. Gaara opens up about his lonely childhood, and Naruto shares his own experiences of being an outcast. This moment of vulnerability cements their friendship, and from then on, they are inseparable.
In some fanfics, Naruto might be depicted as hating his friends due to a misunderstanding. For example, if a false rumor spreads about his friends betraying him, he could start to harbor negative feelings. Another reason could be a dark magic or curse that alters his perception of his friends, making him think they are not who they seem.
A fanfic could explore a scenario where Sasuke decides to teach Naruto some basic Sharingan techniques. Despite Naruto not having the Sharingan, Sasuke believes that Naruto's ability to learn quickly and his unique chakra could allow him to adapt some of the Sharingan's skills. This would strengthen their friendship as they train together and Naruto starts to understand Sasuke's power on a deeper level.
Naruto might become more introverted. Without friends to interact with, he'd have to rely on himself more. He could develop a very independent streak, focusing on self - improvement in his ninja skills without the motivation of friendship. For example, he might train in solitude for long hours, becoming a very powerful but lonely ninja.
Sakura might be really surprised at first. She could offer to help Naruto with his girl disguise, teaching him things like how to do his hair or choose the right clothes. She might also find it a bit funny but would be supportive in the end, seeing it as part of a mission. Sasuke, on the other hand, might be a bit more aloof. He would probably just raise an eyebrow at Naruto's new look but wouldn't make a big fuss about it as long as it was for a good reason.
At first, Naruto might be in shock. He has always trusted his friends, so the sudden betrayal would be a huge blow. He could be silent, unable to process what has just happened.