Ōtsutsuki Isshiki's backup body?

After Uchiha Ensei left, Itachi Uchiha continued his ordinary, mind-numbingly dull life.

Back when he had possessed strength, he had hated war and conflict and wished for peace. Yet now that he was truly living a peaceful life, he found himself missing the days when he had power.

His reunion with Uchiha Ensei after so long had left Itachi Uchiha unable to settle his emotions.

Those experiences should have existed only within a genjutsu world, yet they felt real, remaining etched in his mind every moment of every day.

This torment had made Itachi Uchiha consider death more than once, but it had also made him fear death all the more.

He was afraid that if the world after death really was like what he had experienced in that genjutsu, then he...

What would he even be anymore?

After he spent more than ten days stumbling through life in this daze, an unfamiliar customer arrived at the dango shop.

The instant the man entered, Itachi Uchiha sensed something was wrong, but without his power, he could do nothing.

Apparently, this was the opportunity Itachi Uchiha had mentioned—the chance to regain his strength.

"Signs of having awakened the Mangekyō Sharingan, hmm? It looks as though someone gouged out your eyes and replaced them with an ordinary pair."

The visitor had a very strange hairstyle. Stranger still was how someone dressed so oddly had managed to pass through the Uchiha Clan's barrier, evade the Uchiha patrols, and find his dango shop with such precision.

He must be very strong!

Itachi Uchiha assessed him silently, feeling hesitant about this chance to regain his power.

"Who are you? What do you want?"

Itachi Uchiha pretended to know nothing and gave the most appropriate response.

"I am the man Uchiha Ensei has been searching for