Yes, there might be some fanfiction out there with such a plot. However, it's important to note that these often deviate from the original positive relationships in the Inuyasha series. Fanfiction can be a creative space where authors explore different, sometimes darker, storylines.
One possible theme could be power dynamics. Maybe exploring how Inuyasha's supposed abuse changes the power balance between him, Kagome, and Sesshomaru. Another theme could be the distortion of relationships. It takes the normal relationships in the original series and twists them into something darker.
There might be some 'Inuyasha abuses Kagome' fanfiction, but it's not something that is likely to be promoted or widespread. The original story is about their relationship growing and developing in a positive way, so this kind of negative and abusive take goes against the spirit of the original. However, in the vast world of fanfiction, it's hard to say for sure that none exists.
Another fanfiction concept could be set in an alternate universe where they are all students in a school. Inuyasha might be the troublemaker, Kagome the studious one, and Sesshomaru the aloof and brilliant student. There could be a mystery at the school that they have to solve together, and through this, they form an unlikely friendship.
Sesshomaru is an enigma. In fanfiction, his cold exterior and his pride as a full - demon are prominent. He initially sees Inuyasha as a weak half - breed, but as the story progresses, he may come to respect Inuyasha's growth. His relationship with Kagome can also be an interesting aspect. Sometimes he's indifferent to her, but other times he might be intrigued by her powers and her ability to change Inuyasha.
In fanfiction, the relationships between Inuyasha, Sesshomaru and Kagome can be very diverse. Some fanfictions might focus on Inuyasha and Kagome's relationship, which is often a complex mix of love and adventure in the original series. Their relationship is full of bickering and mutual understanding. While Sesshomaru, being Inuyasha's brother, may be depicted in fanfiction as having a more aloof or even begrudging respect for Kagome. He might interact with her in unexpected ways, perhaps even having a slow - building friendship or an unusual alliance.
One concern could be the misrepresentation of the characters. Sesshomaru is typically a complex and proud character, and having him abuse Kagome goes against his more noble traits in the original series. It can also be disturbing for fans who love the original relationship dynamics between the characters in the source material.
One popular theme is the idea of redemption. Sesshomaru, who is often seen as a cold and aloof character in the original, might be on a path of redemption in fanfiction, and Kagome could play a part in that. Another theme is the exploration of power dynamics. Inuyasha's half - demon status and Sesshomaru's full - demon power, along with Kagome's spiritual powers, create an interesting mix for writers to play with.
Perhaps Sesshomaru sees some value in Kagome. Maybe he realizes that she has certain powers or knowledge that could be useful to him in the future, so he decides to save her from Inuyasha.
There could be several reasons for the existence of such fanfiction. Firstly, it might be a form of creative exploration for those who want to test the boundaries of the characters' personalities. They may think that by putting Inuyasha in an 'abusive' role, they can dig deeper into his character flaws. Secondly, it could be an attempt to create a contrast. Since the original relationship between Inuyasha and Kagome is mostly positive, showing an abusive side can create a sharp contrast. However, this kind of fanfiction often goes against the general perception and liking of the majority of fans.