Nuclear Punk

17 Is a killer, a killer who will retire at the age of 25, but... Before he can spend his pension, he inexplicably traveled through time... Nuclear weapons, implantable armed prosthetics, nuclear exoskeleton armor, mechanically modified humans, biochemically modified humans, nuclear-powered armor... This world makes the always calm 17 a little confused, but even if this world is full of crises, he still will not give up the hope of finding a way back to Earth... Until he becomes a war mercenary, the truth of the world will be revealed one by one...