Brother Zhen, who has returned from time to time, is causing trouble~
When Obito released the Nine-Tails, he was dragged by the system to other worlds to do tasks. Time has stopped, and only 0.01 Seconds has passed here.
Decades of memories belong to the system and were directly "stuffed" into Obito's mind.
[Each world must clear the memory of the previous world]
Summary: Dumb Rabbit was trained by the system - after being taught, he was thrown back to change the world?