a man in his twenties, kusunoki, who can barely afford food or rent is selling everything he can to get his hands on money, when the owner of a bookstore notices he is strapped for cash after he comes in to trade his books. the shopkeeper tells him of a place which buys health, time, and lifespan. after going to another store to trade in his cds, the cashier there notices as well, and tells him about the same shop. kusunoki ultimately decides to go, and after having his life evaluated based on the presence of factors such as happiness, actualisation, and contribution, he discovers that his life is valued at ¥10,000 (~$100) per year. due to the low value, he decides to sell all of his life span except for three months.