Naruto: I'm Sasuke, and I'm Driving Itachi Mad from Day One

[Naruto Fanfiction + Battles of Wits + Trope Subversion + Ruthless Mastermind + System]

"Sasuke, end my life, and carry this obsession with you as you move forward..." Faced with Itachi's genjutsu trial, eight-year-old Sasuke doesn't break down. Instead, he whips out a recording scroll materialized by his system. He rushes out of the house and sounds the alarm throughout the clan: "All Uchiha, heed my command! Itachi Uchiha has conspired with Konoha's leadership to incite unrest! Follow me and apprehend the offenders!"

That night, Sasuke makes the secret correspondence between Itachi and Danzo public. Itachi freezes. I'm trying to protect you! Sasuke sneers. "Protect me by hurting my entire family? Go explain that kind of protection to our parents in the next world!"

That night, the Uchiha clan survives, and Konoha's 'Will of Fire' is shaken to its core. Armed with his "Malice Detection and Evidence System," a relentlessly rational Sasuke exposes the dark secrets of Konoha's leadership, one by one. Don't you all love preaching about the greater good and the rules? Then I'll take the moral and legal high ground-and deal with every last one of you strictly by the book!