He had to disguise himself as a bad guy in order to protect Konoha, so Sasuke had to use cruel methods to make Sasuke hate him. Uchiha Itachi's existence is great.
That day, he lost everything. He went from having everything to having nothing. His entire family died tragically at the hands of his brother. The dream he had been most looking forward to in his life was also shattered. His hope of surpassing his brother and getting his father's recognition and personal approval was shattered. Not to mention, it was replaced by a bloody and cruel reality. His beloved parents died tragically, and his beloved brother who had been his idol and coordinate since he was a child turned into a sworn enemy. This kind of gap is really not something a child can bear. There is only one door between heaven and hell. After the scarlet "that day", the balance of Sasuke's life tilted in an instant.
After rebirth, she witnessed Uchiha Itachi's growth, his sadness, and his expectations.
After rebirth, she witnessed Uchiha Sasuke's growth, his happiness, his pain, his hatred, everything about him.
After rebirth, she became Uchiha Itachi's twin sister. Will her arrival cause a butterfly effect? Will she be the salvation of Uchiha Itachi and Uchiha Sasuke?