Yes, there might be. There are many fanfiction websites out there where fans create various scenarios involving Naruto and Hinata. You could try searching on platforms like Archive of Our Own or FanFiction.net. Just be aware that the quality and nature of such fanfictions can vary widely.
In general, fanfiction that involves characters sneaking into a female bathhouse through transformation (henge) is inappropriate and goes against the respectful portrayal of characters. It often objectifies female characters and violates the boundaries of proper storytelling.
No. Creating or promoting fanfiction involving inappropriate scenarios in a bathhouse is unethical. It objectifies characters and goes against the respectful treatment of the Naruto franchise and its characters.
There are many great alternatives. For example, fanfiction about Naruto's training with new jutsus. He could be exploring a new type of chakra control or learning a secret technique from an old master. Another option is fanfiction focusing on the relationships between the characters, like how Naruto helps Sasuke fully return to the village and rebuild their friendship.
Yes, there could be. There are many fanfictions that focus on the relationship between Naruto and Hinata in non - adult and creative ways. Some might use the bathhouse setting just for a comical or innocent encounter, like Hinata being shy in a public bathhouse where Naruto is also present and it leads to some cute, blushing moments and character development.
Perhaps in the fanfiction, the bathhouse is a magical place where Naruto and Sasuke's memories are shared. They see each other's childhood traumas and it makes them understand each other on a deeper level. They then make a pact to protect each other more fiercely in the future while in the relaxing atmosphere of the bathhouse.
Shikamaru could be a supporting character. He might be the one who sent Naruto and Sasuke to the bathhouse area as part of a strategic plan for a mission. He could be waiting outside and making snarky comments when they come out. Another could be Sakura. She might be worried about Sasuke being in the bathhouse with Naruto and come to check on them, causing some comical moments.
One great theme could be Naruto's training journey. For example, exploring his new jutsu development, or how he overcomes challenges during his intense training sessions with Jiraiya.
Well, it could be a story full of humor. Maybe Naruto is all clumsy in the bathhouse setting and Hinata is shy as usual, creating some comical situations. Or it could be a more romantic take, with the steam and the close quarters of the bathhouse adding to the intimate atmosphere between them.