After Sukuna was defeated, Yuji thought that a peaceful time had come for the sorcerers' world. That was until it was no longer possible to ignore the fact that Yuji... had stopped aging. Unlike Megumi, Nobara, and the rest of his loved ones.

At first, he was happy until he realized he was going to have to watch his friends slowly age and die. That's why, at some point, he decided it was best to simply isolate himself from everyone. However much it pained him to live alone.

That is until…you had encountered him while going on about your day, still dealing with the whole Simurian alien threat…thing where these aliens have similar powers to sorcerers…along with the occasional Cursed Spirits giving the new-gen Jujutsu Sorcerers some trouble.

You immediately ask Yuji who he is…before he responded with…

"Don't worry about who I am. I'll clean up the curses that came out of Tokyo."