What the hell is playing games in the ninja world?

Description

Uchiha Kei: "I'm such an unlucky guy who traveled to the ninja world. The system is actually a scam used to make games and train me to become a super game producer. What kind of suffering in the world!?"
System: "After testing, this is the Earth in 2024. Please host to complete the production of the first game as soon as possible."
Uchiha Kai: "Okay, okay, that's how you play, right? OK, since I'm having a hard time, let's use Uchiha's way to make the world feel pain!"
"Start the underworld game!"
From then on, there was an old Uchiha thief in the ninja world who used Sharingan to create underworld games to take revenge on the world.
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