A unique take on the 'assasin-for-hire' story, as the assasin 'Tsubame' actually is four different people with four different modes to kill. Penguin is a small quiet kid who has beastly sniper skills, Washi ...

The world as we knew it ended. Radiation covered the world aboveground and turned it into hell. And humanity headed deep into the underground. Using the world’s most developed underground network as its ba...