The background music that the girl was humming was " One Thought, One Life ". The song was written, composed, and sung by Li Jian. It was released as a single on November 28, 2019. " A Lifetime in One Thought " was the theme song of the TV series " Celebrating Years ". It gave people the feeling of parting, loneliness, and loneliness.
It might be a very specific and creative concept within a particular fan community. Maybe it refers to a fanfiction that is inspired by the sound of humming, like the mood or atmosphere created by the humming sound is translated into a story. For example, it could be a fantasy fanfiction where the humming has magical properties and is a central element in the world - building.
Often, the 'naruto humming swordsman fanfiction' will introduce new types of jutsu or abilities related to the humming sword. It could be something like the sword being able to create sonic waves that can disrupt enemy chakra flow or even a form of communication through the humming sound. This not only makes the character stand out but also creates new plot possibilities as the other characters in the Naruto world have to adapt to this new threat or ally.
There's a fanfic called 'Melodies of the Heart'. In it, Sakura's humming serves as a form of self - comfort while she's on missions away from Sasuke. As the story progresses, Sasuke realizes how much he misses her humming when she's not around. It's a really sweet and emotional story. There are also some fanfics that explore how Sakura's humming can be a source of healing for Sasuke, especially when he's dealing with his past traumas.
" I'm the Villain in the Heavens of Movies and Television " was a martial arts novel written by Xiaodiao Hen Heng. The story told the story of the protagonist Dong Tianbao, who wore the role of a movie villain and launched a series of adventures and challenges in the myriad worlds. Dong Tianbao traveled through different worlds of film and television by showing off his operations, abusing the protagonist, stealing luck, changing the plot, and so on. The novel had a total of 396 chapters, and the latest chapter was chapter 395.
There's also a fanfiction where the humming swordsman is a new character introduced into the existing Naruto universe. In this story, he teams up with Naruto and the gang to face a new threat. It delves deep into the lore of the Naruto world while adding its own unique elements with the humming swordsman's abilities. His sword not only has the power of humming but also can manipulate chakra in an unusual way, making for some really exciting fight scenes.
In a Sasuke - centered fanfic, Sakura humming to herself could signify her longing for Sasuke. It could be a way for her to express her emotions that she can't put into words. Maybe she hums the tunes that remind her of the time they spent together.
Since I'm not sure of the exact nature of this 'the sound of humming fanfiction', I can't give very specific examples. But it could be something like a fanfiction about a singer in a band who hums a tune that has a special meaning, and the story revolves around that humming and its impact on the other band members.