Perhaps in the fanfiction, his lover was involved in something dark that Itachi couldn't tolerate. For example, she might have been collaborating with the enemies of Itachi's clan. So, to preserve the honor and safety of his clan, he made the difficult decision to kill her. It could also be that Itachi was misinformed about his lover's actions and later regretted it deeply.
The story might develop with Itachi seeking redemption in some way. He could start to perform heroic deeds to atone for what he did. Or, on the other hand, he could be hunted by those who were close to his lover. His actions could also trigger a chain of events that expose some hidden secrets in the world of the fanfiction, like secrets about his clan or the political situation in their land.
The impact would be huge. For one, all of Naruto's friends like Sasuke and Sakura would be devastated. Their whole world view which was centered around Naruto's positive influence would be shattered. Also, the village of Konoha would lose its greatest hope for the future. Naruto was seen as the one to bring about change and peace, so without him, the village might descend into chaos or be more vulnerable to outside threats.
" The Killer Babysitter " is a novel written by the author, Little White Thirteen. It is an urban supernatural novel. The general plot of this novel is as follows:
Six years ago, the world-famous assassin group, the Dark Night Assassin Group, was an organization from hell that made the leaders of the world scratch their heads. With his undefeated record, he became the pinnacle of the assassin world at that time and became the " nightmare " of many people! When the organization was at its peak, as the leader of the twelve assassins under the Dark Night Killer Emperor, he was codenamed White God! The man had mysteriously disappeared and his whereabouts were unknown. Six years later…in a bustling city, a pair of silly father and daughter appeared. They lived an ordinary life, but danger quietly came to their side. While escaping from the pursuit…
----------------------------
" Supreme Metropolis " was a novel about urban life written by the author, Han Yu. The general plot of this novel was:
After four years of disappearance, the Supreme Martial Artist had returned! Those who insulted my lover back then, kill! Those who insulted my family back then, behead! " From today onwards, I will protect you for the rest of your life!
----------------------------
The Reborn Killer was a novel about urban life written by Han Enjia. The general plot of the novel was:
This was a story about the growth of an assassin. It was very real and sad...
He was a waste abandoned by the world. After being trampled and crushed, he never looked at him again.
No one had ever entered his world. No one cared about his thoughts or his tears.
There was only loneliness.
There was only coldness and darkness.
Assassins.
This dangerous, synonymous with the source of evil had always haunted him.
It could not be erased or replaced.
Was it rebirth, or was it another destructive trap…
----------------------------
" Baby Vengeance: Ruthless Daddy and Killer Mommy " was a modern romance novel written by the author, One World Ancient Buddha. The general plot of this novel was:
Her serial number was AK47. She risked her life to complete the last dangerous mission in order to escape from his hands. In front of others, he was a gentle and refined noble son, but behind the scenes, he was the mastermind behind the bloodthirsty and cruel experimental killer. The final pain made her run away from him. The last bit of reluctance made him chase after her. " You're just one of my many experimental subjects. Do you think I'll treat you well?" The man smiled disdainfully at the woman, but that smile only made people feel cold. "You don't deserve my child. Abort it or die. Choose one." After the man finished speaking, he turned around and left, leaving behind his back. The woman laughed at herself. What kind of man did she fall in love with? [Fragment 2]" I want to leave!" The woman decided to leave his side. "Sure." The man might not have meant it, or he might have given his heart to someone else. She didn't want to chase him anymore…
----------------------------
" The Rebirth of the Killer: The Black-bellied Child of a Sky-high-priced Mother " was a modern romance novel written by the author, Juniper. The general plot of this novel was:
The dark forces chased after her, who was listed as a traitor, and blew her and her son into pieces. She had been reborn, and now she and her son had returned to the time half a year ago when they were killed in the explosion. After her rebirth, she decided not to hide anymore and brought her black-bellied son to explore the world. The constant appearance of assassins, love rivals like fake flowers, the disappearance of the supernatural ancient city, the reason for the supernatural ability, the secret of the founder of the dark forces, what was the connection between the past life and this life? Exploration and resistance, life or death!
----------------------------
" The Small Town's serial killer " was a modern romance novel written by Imperial Wind Lotus. The general plot of this novel was:
In the past few years, there had been several murders in the town. The murderer had always been at large. The director of the comprehensive management department had investigated the real murderer. The murderer turned out to be...
----------------------------
" The Killer's Beautiful Wife's Powerful Return " was a modern romance novel written by the author, Fu 'er. The general plot of this novel was:
In her previous life, she was the famous number one assassin. She was ruthless and vicious, but she was betrayed and died at the hands of her companions. Returning from purgatory, trying to play tricks? Let's see who can beat who!
----------------------------
The Killer God of the City was an urban supernatural novel written by the author, Fat White Cat. The general plot of the novel was:
Three years ago, he was still a member of his family. He was ridiculed and abandoned before joining the army. "Three years later, he will rule the world, but his family will be persecuted. As the God of Slaughter, I will kill everyone who can be killed!
----------------------------
Call Me Mama: Sin Love Is You was a modern romance novel written by the author Ye Hua. The general plot of this novel was:
.He had once loved her mother sincerely; he loved her now without hesitation; she had schemed step by step just to call her mother mother in front of everyone; her mother had become a puppet in her daughter's hands just so that her daughter could call her mother again. lt;br/><br/>.Was his family being trampled on or was love becoming a tool? When he uncovered the shocking conspiracy and the truth was revealed, he completed the transformation of a man. He began to return the favor. lt;br/>..
----------------------------
The book " The Wealthy Young Masters " was a novel about urban life written by the author. The general plot of the novel was:
I didn't mean to fight, but you guys just had to die…
Perhaps his parents were misled to believe that Naruto was a threat to the village. They might have been fed false information about Naruto being a potential danger, like being a vessel for a great evil. So, in an attempt to protect the village they loved, they made the tragic decision to kill him.
Well, it could be for the sake of exploring a different kind of magic or a different set of rules in the wizarding world. Perhaps in this fanfiction's version, the parents were under some sort of dark magic influence that made them turn on Harry. Or it could be a psychological exploration. The writer might be interested in delving into the minds of Harry's parents and seeing what could make them do such a heinous act. It could also be just a very different take on the concept of family and love in the 'Harry Potter' universe.
This is a really unusual concept for a fanfiction. The entire 'Harry Potter' story is built around Harry being an orphan because of Voldemort's actions against his parents. Having his parents be the killers in fanfiction completely changes the dynamic. It could be a way for some writers to explore themes of betrayal, but it goes against the well - established lore and the positive image of Harry's parents. So, it's not a common type of fanfiction and might be a shock to many 'Harry Potter' fans who are used to the traditional story.