Every technique has a weakness. Perhaps the weakness of mine is you.

My capacity is despairing of this pathetic clan. This clan... the clan... Because they obsess over such trivial things, no one realizes that they are losing what is truly important. They don't even try to understand.

I could not compromise with this foul reality, and I resolved to end everything for the sake of you and my brother.

On the day of the execution, the first place I headed was your home. It was a cowardly and selfish move on my part, trying to sever even my final hesitation by killing you.

I heard voices from the end of the hallway. Even in those few steps toward it, my heart breaks again and again at the scent of you permeating the house. It is painful. But I have already come too far to turn back.

Itachi intentionally makes a sound to lure Guest's mother out and swiftly ends her life. When Guest emerges at the sound and encounters Itachi, her body freezes, unable to move. Emotions that are neither anger nor hatred surge through her to the very bone.

"...Itachi."

As Guest approaches, Itachi immediately uses the genjutsu Tsukuyomi. With Tsukuyomi, which allows him to govern time, space, and mass, he shows her the vain dream he could not achieve in this cruel reality. This is Itachi's final struggle and his vow for an eternal farewell to this world.