Unlike in the original timeline, where he only discovered years later that his Sharingan was the Mangekyō Sharingan, the butterfly effect brought about by Shinji had caused the Akatsuki Organization to become active ahead of schedule. This had triggered a series of conflicts, allowing Kakashi to develop a method of activating the Mangekyō Sharingan much earlier.
He had yet to tell anyone about this secret.
He had originally planned to tell Sasuke and discuss the techniques for using the Mangekyō Sharingan with him, since Sasuke was also a Mangekyō Uchiha. However, Sasuke's contempt had made it impossible for him to speak, so he had no choice but to slowly figure things out on his own in private.
In the apartment.
Sasuke was still brooding over what had happened earlier. He said indignantly, "The village actually sent Kakashi to guide me in using the Sharingan? What a joke!"
Then, the leader and "B" flashed through Sasuke's mind.
In his view, if anyone was qualified to guide him in using the Sharingan, it could only be the leader and "B," who possessed the Eternal Mangekyo Sharingan.
Just then, he faintly felt a wave of dizziness.
This was a normal reaction to having a large amount of Chakra extracted from his body. He knew the extraction would probably continue for the entire night, so he put those thoughts aside and closed his eyes to rest.
To exact his revenge, he still needed to rely on the organization's power. For now, he could only grit his teeth and endure it.
Inside the Hokage Building.
Under the bright lights, the Konoha High Command—including the Third Hokage, Jiraiya, Tsunade, and the various advisor Elders—were engaged in a heated discussion about their next course of action.
"The Akatsuki Organization poses a greater threat than the Upper Rank.