Crying Freeman - Kazuo Koike

He is Yo Himomura, deadly assassin for the 108 Dragons, the Chinese Mafia. But to the criminal underworld who fear him, he is known as Crying Freeman, the killer who sheds tears at the fate of his victims. A young, handsome, sensitive artist, Yo has been hypnotically programmed by his Dragon masters to kill on command: he cannot resists his masters' commands to kill; his masters cannot stop his tears of remorse. Written by the legendary Kazuo Koike, creator of Lone Wolf and Cub, and illustrated by the incomparable Ryoichi Ikegami, Crying Freeman is adult manga at its darkest.