the imprint of evil 2 volumes 1 and 2

In this world imagined by Aya Kanno, the military republic of Galley reigns supreme over the globe: reduced freedom, intellectual tyranny, persecution, no pocket of resistance has the courage or the means to resist. It is in this universe that Zen, a cold and solitary hitman, evolves. Assassin, bank robber, he stops at nothing and no one. Nor does he love or appreciate humankind. He is evil and always has been. And despite his lost memories, he knows that evil is part of him. Yet, isn't his past (which he himself has forgotten) at risk of catching up with him?