Tenshi wa Tobacco no Kao o Shite

Darling is the most feared name in the assassination business—the greatest hitman alive, a legend no blade has ever touched and no bullet has ever caught. Yet one fateful day, this untouchable killer is suddenly brought to his knees by excruciating pain burning through his chest. This is no wound dealt by an enemy's hand. The true culprit is something far more insidious: the cigarettes that have accompanied him through every job and every kill. The man who has ended countless lives now finds himself under siege from the very habit he never questioned—and his own body has become the battlefield. What follows is an explosive battle-action tale in which the world's deadliest assassin faces his most formidable opponent yet: his addiction to smoking. For Darling, the war to quit may prove to be the most dangerous contract of his entire career.