The Underworld Courier

Because of my best friend, I started working as a courier for the underworld, delivering letters to people who are about to die. From that point on, I embarked on a bizarre and terrifying path.

A strange phone, an envelope tied to death: is it coincidence or fate? And who is he, really? Where did this peculiar envelope come from? Is it all a trap, a frame-up, or a fortune-making opportunity that can't be avoided?