(Thank you very much to 'July Maple Snow Sakura' and 'Millet Grass' for the tips!)
"Crack—!"
When Rentaro turned himself into a cannonball and shot forward like a bullet leaving the barrel, his left eye suddenly rotated like a precision miniature instrument, gleaming with black light.
—Type 21 Black Luminary Stone Prosthetic Eye.
It was a computational device installed in Rentaro's left eye that could accelerate his thought processes.
Within that prosthetic eye, the world Rentaro saw had slowed down hundreds, even thousands of times.
Thus, in Rentaro's eyes, the swarm of Gastrea that had just charged at him like a raging flood seemed to be moving in slow motion, stomping across the ground and roaring as they rushed forward.
At the sight, all of Rentaro's prosthetic limbs suddenly tensed.
Rentaro's prosthetic limbs were not merely metal limbs made of Super Varanium, possessing powerful offensive capabilities.
Inside those prosthetic limbs were ammunition cartridges.
There were ten in each arm.
There were fifteen in each thigh.
These ammunition cartridges were special items. Once fired, they generated an enormous propulsive force, granting Rentaro superhuman enhancements to both his attacks and speed.
Faced with the vast number of Gastrea charging at him, Rentaro fired the ammunition cartridge in his leg without hesitation.
"Bang—!"
Accompanied by a loud sound like a gunshot, an empty shell casing was ejected from Rentaro's right prosthetic leg and tossed into the air.
"Boom—!"
Rentaro's speed instantly surged. The propulsion device in his leg activated at once, turning the cartridge's force into a jet of light and sending Rentaro shooting away like a meteor.
Then Rentaro fired the ammunition cartridge in his right arm as well.
"Tendo-Style Combat Arts, Type One, Number Three—!"
Rentaro, streaking forward like a meteor, suddenly twisted his body and clenched his fist.
**"Rotor Rook