One possibility is that there's some ancient chakra or energy in Wave that interacts with Naruto's own chakra. The unique environment of Wave, with its water and nature elements, might have caused his Mokuton to awaken. Another reason could be that Naruto has some kind of connection to the First Hokage that gets revealed during the Wave mission, and that connection enables the Mokuton awakening.
I'm not entirely sure as there could be many different stories with that title. It might be about a character in Naruto who has the Mokuton (wood - style) ability being banished from their village or group.
If Naruto uses Mokuton in fanfiction, it might change his relationships with other characters. For example, the Hidden Leaf Village might view him as an even greater asset. And his friends could be both in awe and a bit jealous. Also, it could potentially lead to new story arcs where Naruto has to hide this new ability from enemies who would target him specifically for it.
There are fanfictions where the Mokuton power in Naruto is linked to an ancient forest spirit. In this kind of story, Naruto has to learn to cooperate with the spirit to fully master his Mokuton abilities. He might go on a journey into the heart of an old forest to communicate with the spirit and gain new powers related to the Mokuton, like the ability to make trees move and fight on their own.
One interesting mokuton Naruto fanfic could be 'The Mokuton Legacy'. It might explore how Naruto discovers and masters his mokuton abilities in a unique way, different from the canon story. Maybe he meets an ancient sage who teaches him special mokuton jutsu.
One popular fanfiction concept could be Naruto discovering he has Mokuton abilities during a battle. Maybe he's facing a powerful enemy and suddenly, the Mokuton powers awaken within him, giving him an edge with the ability to create and control wood. This could lead to him having to learn how to master this new power quickly while still in the heat of combat.
The mokuton ability is really cool. In Naruto, it's unique and powerful. Fanfictions about it allow fans to explore more of what could be done with this power. For example, seeing Naruto use mokuton in new and creative ways in battles is exciting.
In Naruto has Mokuton fanfic, the world - building aspect can be great. The presence of Mokuton in Naruto can lead to new clans or groups emerging in the ninja world. Maybe there are those who are jealous of his power or those who want to study it. This can expand the existing Naruto universe. Also, the fanfics can explore the origin of Mokuton in Naruto in ways that the original series didn't. It could be a long - lost inheritance or a result of some special chakra combination. All these elements add depth and richness to the fanfic.
If Naruto entered Highschool DxD with mokuton powers, it would be a wild ride. His powers would make him a target for some who want to use his abilities for their own gain. But Naruto being Naruto, he would make friends with the good - hearted characters. He could teach them about his ninja ways and learn about their magic and devil powers in return. His mokuton would also allow him to create unique training areas for himself and his new friends to get stronger.