Perhaps it's a love story. The protagonist has a deep, unspoken attraction to someone with black hair. They might finally get a moment alone with this person and the act of running their hands through the hair is a turning point in their relationship, like a confession without words.
It could be a story about loss and memory. The black - haired person might be someone the main character has lost, and they keep having flashbacks of the times when they could run their hands through that hair. This fanfiction could then be about how they cope with the loss and hold on to those memories.
This title might suggest that the story focuses on a relationship where the act of touching the other person's black hair is significant. It could be a symbol of connection, trust, or a way to convey unspoken feelings. For example, in some stories, such characters might be in a forbidden love, and this small act is one of the few ways they can show their love physically.
The black hair tie on the wrist can be a part of a character's transformation. Suppose a shy character decides to take off the hair tie from their wrist and tie their hair up, signifying a newfound confidence and a change in their attitude towards a situation in the fanfiction.
If the GIF animation created by the fast hand was deleted from the user's fast hand collection, the trace of the GIF animation in the fast hand would disappear. Because Kuaishou was a social media application, GIFs uploaded by users needed to be stored on Kuaishou's server. If the user deleted the GIFs, their storage location on Kuaishou would change. Therefore, when the user viewed the GIFs on Kuaishou, their traces would disappear.
In hair fanfiction, a black hair tie on the wrist can symbolize a connection to a particular character. It might be something that the character left behind or a memento. For example, if it was from a love interest, it could represent an unspoken bond or a longing for that person.
I'm not sure specifically which 'black hands story' you are referring to. It could be a story about some sort of mystery or crime involving people with 'black hands' in a metaphorical sense, like a group doing underhanded things.
In some horror stories, a black hair might be left as a sign by a malevolent spirit. For example, a family moves into a new house and starts to find black hairs in strange places like inside the drawers where they keep their clothes or on their pillows when they wake up. Every time they clean them up, more hairs appear, and they start to feel like they are not alone in the house and something is watching them.
One possible plot could be that the black hair tie is a memento from a special person. Maybe it was given to Alison by an old friend who has since moved away. The story could revolve around Alison's memories associated with this person and how she embarks on a journey to reunite with them, with the hair tie serving as a constant reminder and a source of motivation.
Perhaps the plot could involve a young woman who discovers an old black bra in her attic. When she puts it on, she suddenly feels a newfound confidence and starts to pursue her dreams more actively.
The plot could be that the Black Widow (assuming it's a person) is at a party. Some jealous rival decides to play a mean prank and gives her a wedgie in front of everyone. She then gets revenge by using her wits to expose the rival's bad behavior.
One common theme is the uniqueness of Kuroko. His black hair often symbolizes his quiet and mysterious nature. For example, in many fanfictions, his black hair is associated with his ability to blend in and then surprise opponents on the basketball court.