Perhaps a plot point could be Naruto's relationships changing because of this mask. His friends might initially be confused or even a bit annoyed by his 'idiocy', but as they discover the truth, it deepens their bond. Also, his enemies might not take him seriously until it's too late, which could lead to some epic battles where he turns the tables.
Well, at first, Naruto might seem like he's just having fun with the 'mask of idiocy'. But as the story progresses, he could start to use it more strategically. This would force him to think on his feet and adapt to different situations quickly. Through this, his confidence might grow, not just in his combat abilities but also in his ability to outwit his opponents. His relationships with his friends could also evolve. They might start to see a different side of him, and Naruto would have to learn how to handle their reactions. Overall, his character would become more complex and multifaceted in this fanfic.
Maybe it was Jiraiya. Jiraiya was a very important figure in Naruto's life. He could have given Naruto the mask as part of a training exercise. He might have thought that wearing a mask would force Naruto to rely more on his intelligence rather than his brute strength in certain situations.
Perhaps Naruto wears the mask as a symbol of a new, more strategic side of himself. He could be using it to intimidate his opponents in battle. Since he's smart in this fanfic, he might have realized that a mysterious appearance can give him an edge. He could be using the mask to play mind games with his enemies, making them wonder who he really is and what his true capabilities are.
One possible plot could be that Naruto wears a mask to hide his identity while on a secret mission in another village. He might be gathering intelligence about a new threat that could endanger the Hidden Leaf. While wearing the mask, he has to interact with the locals without giving away his true self, leading to some comical and tense situations.
Another possibility is that Naruto wears the mask as a tribute to Kakashi after a significant event. It could be that Kakashi sacrifices himself to save Naruto and the village. So, Naruto dons the mask to carry on Kakashi's legacy and to always remember the lessons he learned from him.
One possible reason could be for disguise. Maybe he is on a secret mission and doesn't want to be recognized easily. In the Naruto world, there are many dangerous foes, and wearing a face mask can help him blend in or hide his identity from those who might be targeting him.
In the "Mortal Cultivation Biography", when Han Li joined the Drifting Cloud Sect, he had to wear a mask to conceal his face due to his cultivation of the Eternal Spring Arts. As such, he wore a silver ghost mask.
While waiting for the TV series, he could also click on the link below to read the classic original work of " The Legend of Mortal Cultivation "!
If it's a more spiritual fanfiction, the mask could have a connection to the spirit world. Naruto wearing the mask could open a portal to that world or allow him to communicate with the spirits of past ninjas. He could then seek advice from the great ninjas of the past through the power of the mask.
Well, obviously, the addition of the face mask gives him a more mysterious look. His usually open and friendly face is partly hidden, which might make others view him with more caution or curiosity.