The Return of the Reaper ~Assassin~

Once, there was a man feared as the ultimate hitman. His code name was "Nightshade." Possessing a thousand techniques to sever human nerves, he would strip his targets of their five senses and lead them to their deaths. In the underworld, everyone knew him as the "Reaper." However, he is no longer in this world. For reasons known only to him, he defied orders to protect a young girl, and was eliminated by the hands of his own organization. 17 years after his death... absolutely no one could have imagined that he would be reincarnated, only to live as a high school student. One high schooler against the strongest assassins, each wielding unique "Traits"... To rescue a single girl held captive by the organization, he stands up against the world's largest dark syndicate.