The City of Killers: I, Okahachiro, Ignore the Death Game's Script!

[Gantz + no dumbed-down characters + crossover anime + no heroine (one? ) = ???]

I transmigrated into Oka Hachiro. This time, I’m going to slaughter the Demon King!

The upgraded System says, “Steal the protagonist’s opportunities to get even more rewards, Master~”

Chen Ming: “Steal them? They’re all mine!”

System: “Master, I was wrong!!”

Nishi Joichiro: “He really has changed...”

Izumi: “If it’s him, maybe he really can do it...”

Kazemon Saemon: “Oka, let’s see who can kill more bosses!”

Anzu: “Big Brother Oka is mine. Reika, don’t you dare steal him!”

Reika, blushing: “Oka, yamete!”

(The setting draws on Gantz, with plenty of fan-created content. Please be understanding.)