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.
Perhaps in the fanfiction, there is a magical swimsuit that Naruto discovers. He henge into it to gain special powers. The swimsuit could give him the ability to swim at super - fast speeds or even walk on water. This new power leads him on an adventure where he has to use it to save the village from a flood that is being caused by a rogue water - jutsu user. He becomes the hero of the village in his swimsuit - henge form.
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.
Perhaps there's an enemy who is only attracted to beautiful women in swimsuits and Naruto uses the Henge to lure the enemy into a trap. He has to perfect his female mannerisms and appearance to be convincing enough to draw the enemy in. Along the way, he might get help from Ino to style his 'female' look.
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 a girl uses the henge technique to transform into different characters while at the beach in a swimsuit. For example, she could transform into Naruto to compete in a beach volleyball game in his style, leading to some comical and action - packed moments.
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.
One popular theme could be the female characters using the henge to surprise their friends at the beach. For example, Sakura might henge into a mermaid - like swimsuit form to amuse Naruto and the others. Another theme could be a sort of swimsuit competition where the henge is used to create unique and elaborate swimsuits. Also, a story could revolve around a mission at a beach resort where the female characters use henge for undercover work in their swimsuit forms.
Perhaps in this fanfiction, Naruto discovers that by henge - ing into Latias, he gains some of its unique abilities like flying at high speeds and using psychic - type moves. This could lead to him training with these new powers and showing his comrades in Konoha that there are new ways to fight. He might also form an unexpected bond with other Pokémon who initially mistake him for the real Latias.
The plot could center around Fem Naruto's henge failing at an inopportune time. Say she's trying to infiltrate an enemy base, but the henge drops right in the middle of it. She then has to use her natural skills and wits to get out of the situation. It might also lead to some interesting character development as she learns to accept her true self more.
Well, one possibility could be that Naruto uses his henge technique to disguise himself as a girl in order to buy a bra for a female friend who is too shy or unable to do it herself. He might get into all sorts of comical situations in the store, like not knowing the right size or being confused by all the different styles.