Naruto System in One Piece - Chapter 25

Lao Zhe’s Realistic Style Anti-Japanese War New Book

“We will definitely come back!” A military officer said to thousands of officers and soldiers under his command.

But since they left the customs, the invaders are strong, the country is still in danger, how is the family safe? The battle line goes all the way to the south, fighting countless Guanshan Mountains, but losing countless Guanshan Mountains, until the top of Cangshan Mountain and the bank of Erhai Lake!

Looking back, there is endless smoke and mountains, how many officers and soldiers are buried in other places? A war of resistance has been fought for fourteen years, how many people can return to their hometown?

- Description from novelbuddy

There was a Senior Brother and a Junior Sister. One of them was transmigrated to this world and had cheats while the other was the reincarnation of a Great Emperor.