In the year 2035, after the largest thermonuclear war in history. This catastrophic event destroyed 90% of the Earth's surface and collapsed many economies. Surprisingly, from this devastation emerged a world where humanity’s most pressing issues—crime, disease, hunger, and unemployment—disappeared entirely, along with negative emotions like sadness.

Mikomi Hinome, a 20-year-old history student who works part-time and always has a pack of cigarettes on hand, navigates this seemingly perfect society with a faint smile. However, she longs for one thing: money. One day, she learns about a television program called "18h," where a participant is randomly selected to play a deadly game of survival. If a person survives, they win $100 million, but the game is broadcast through a system called "facabrumpere vision," allowing viewers to hunt down the participant for a $100 reward.

Will Mikomi kill for money? Will she smile all the time? What are the secrets of this?