Shin Uchiha saw Kakashi's bewildered expression and stopped holding anything back. He spoke slowly and directly:
"Kakashi, after examining your Sharingan, I discovered that it isn't an ordinary Three-Tomoe Sharingan. Like my eyes, it's a Mangekyō Sharingan. But because you don't have Uchiha blood, and you haven't fully adapted to this Sharingan yet, it hasn't revealed its power or its innate dōjutsu."
Kakashi touched his Sharingan in bewilderment. He had never imagined that the eye Obito Uchiha had given him, which had stayed with him for so many years, was actually a Mangekyō Sharingan. He wanted to question Shin Uchiha's words. Could he have been mistaken, or was he deliberately deceiving him? But what would he gain from that?
Besides, Shin Uchiha was a genius who had awakened the Mangekyō Sharingan himself, and he was now the Uchiha Clan's Deputy Clan Leader. Whether in strength, authority, or future prospects, Kakashi could not compare to him.
Shin Uchiha could see Kakashi's disbelief and confusion. He said sharply, "Kakashi, look at me. I'll use my Mangekyō Sharingan to guide yours. Once your Sharingan reveals its true form, you'll understand everything."
Hearing Shin Uchiha's words, Kakashi was eager to learn the truth and understand what was going on. He gritted his teeth, raised his head, and met the gaze of Shin Uchiha's Mangekyō Sharingan.
When Shin Uchiha had copied the dōjutsu of Kakashi's Sharingan earlier, he had already stimulated the eye and caused it to transform into a Mangekyō Sharingan, so he knew the process well this time.
Once Kakashi met his gaze, Shin Uchiha activated his Mangekyō Sharingan and connected it to Kakashi's Sharingan. Of course, this was all done with Kakashi's consent. Without it, even Shin Uchiha's eternal Mangekyō Sharingan could not have influenced Kakashi's eye.
After linking to Kakashi's Sharingan