One possible fanfiction idea could be Naruto using his henge technique to transform into someone wearing a really cool swimsuit. Maybe he does it for a mission at a beach resort where he has to blend in with the tourists. He could transform into a famous surfer and use his skills to gather information.
One possible fanfiction could be that Naruto henge into a swimsuit as a prank. He might transform into a ridiculous swimsuit -covered version of himself to make his friends laugh. For example, he could turn into a swimsuit with a huge fish pattern all over it and start acting like a goofy mermaid in front of Sasuke and Sakura, just to break the tense mood during a training session.
In the fanfiction, there could be a situation where an enemy attacks the beach area where female Naruto and her friends are having a swimsuit party. Female Naruto, in her swimsuit, quickly springs into action. Kurama's power surges through her, and she uses her ninja skills combined with the unique situation of being in beachwear. For example, she might use her swimsuit's fabric as a distraction or a binding tool against the enemy.
The henge in a swimsuit fanfiction could be used in a comical way. For example, Naruto might accidentally henge into a girl in a swimsuit and then have to deal with the reactions of his friends. It would be a source of much laughter and some awkward moments.
One idea could be that Fem Naruto enters a beach volleyball tournament on the Hidden Sand's beach while wearing a Kurama - themed swimsuit. Her unique look attracts a lot of attention and she has to deal with both admiration and jealousy from other competitors.
Well, often there's a theme of self - discovery. The female characters might be in swimsuits and through the events at the beach or pool, they learn something about themselves. Also, there can be a bit of a romantic theme. For example, a male character in Naruto might notice a female character in a new way when she's in her swimsuit. This can lead to some budding romantic feelings or interactions. In some cases, there could also be a theme of competition, like a swimsuit - related contest in the Naruto universe that the female characters participate in.
The plot could involve Naruto using the henge to transform into a swimsuit - clad figure as part of a bet. His friends bet him that he can't stay in a particular henge for a whole day, and the swimsuit henge is what he chooses. Along the way, he has to deal with the embarrassment of being in such a form in public places in the Hidden Leaf Village, like the market or the training grounds.
I'm not sure of specific 'naruto female swimsuit fanfiction' titles offhand. But you could try searching on fanfiction websites like FanFiction.net or Archive of Our Own. Just type in 'naruto female swimsuit' in their search bars and browse through the results.
One possible scenario could be that Naruto uses the Henge for a mission at a beach. Maybe he has to infiltrate a group of female swimmers to gather some information. He gets into all sorts of comical situations while trying to maintain the Henge and act like a girl in a swimsuit. For example, he might not be used to walking in a female's swimsuit and keeps tripping over or getting embarrassed by the revealing nature of the outfit.
The plot could be that female Naruto is training near a beach. She decides to take a break and put on a swimsuit. Kurama, inside her, is initially grumpy about this break. But then, they notice some strange energy coming from the ocean. They team up, with Naruto in her swimsuit, to investigate. Along the way, they meet new characters who are also intrigued by the strange energy.