Naruto: The Uchiha's Housebroken Ghost King

[Hokage] [System] [Mostly Daily Life] [No Female Lead]

After transmigrating into the Warring States period of the Hokage world, Yun Zhou awakens the Strongest Demon King System. All he has to do is successfully turn a famous character into a demon to unlock system rewards, grow stronger, and reach the pinnacle of life.

The trouble is, Yun Zhou is not only a cautious sort, but also an outsider who knows next to nothing about Hokage. The only reason he knows he has transmigrated into the Hokage world is the few scraps of information his friend once told him.

So Uchiha Yun Zhou keeps his head down within the clan and becomes a nobody. His only friend is Uchiha Izuna, the clan leader's youngest son.

The Uchiha go to war. Yun Zhou: Keep my head down.

The clan leader dies. Yun Zhou: Keep my head down.

The Senju and Uchiha fight to the death. Yun Zhou: Keep my head down.

Izuna is gravely wounded and on the brink of death. Yun Zhou: Keep my... No, I can save him.

After successfully converting a famous figure, Yun Zhou's strength surges.

The Senju and Uchiha build a village. Yun Zhou: Keep my head down.

Uchiha Izuna: Are you planning to keep your head down until the end of time?

Uchiha Yun Zhou: You have to stay alive to make a difference!