I’m a Spy at Konoha Academy

After transmigrating to the world of Hokage, Cheng Qi discovers he arrived far too late. The timeline is somehow a thousand years after the Fourth Shinobi World War. Konoha Village is gone, replaced by Konoha Academy.

And because his parents sold him, Cheng Qi is forced to come to this academy as... a spy?

Wait, who is Uzumaki Hikari? Is she the girl Naruto Uzumaki turned into with Sexy Jutsu, but with Uchiha Hikari's hairstyle?

And who is Uchiha Yue, who has both the Sharingan and Medical Ninjutsu?

And Hinata Momoko, why are you bringing a ninja dog when you clearly have the Byakugan?

(A sort-of-original Hokage sequel set at an academy.)