"Kill the ninja. Show no mercy."

The story takes place in the cyberpunk metropolis of Neo-Saitama. After his wife and child are killed in a ninja turf war, salaryman Kenji Fujikido gets possessed by a mysterious ninja soul known as Naraku Ninja. As Naraku's craving for massacring the evil ninja overlaps with Fujikido's lust for revenge, together they bring Ninja Slayer – a terrifying ninja-killing grim reaper - into existence. The more their mental resonance and physical symbiosis deepens, the more powerful Ninja Slayer becomes. If Fujikido completely surrenders himself to Naraku, he will be unstoppable, at the cost of Naraku being able to massacre freely without restraint.

Nimame's AI patch has already been included.

The 2nd file is BluishCat's edit, which features Kasai's AI and Guilty Gear-style gameplay.