The Core of the Sun

The Eusistocratic Republic of Finland has bred a new human sub-species of receptive, submissive women, called eloi, for sex and procreation, while intelligent, independent women are relegated to menial labour and sterilized. Vanna, raised as an eloi but secretly intelligent, needs money to help her doll-like sister, Manna.
Vanna forms a friendship with a man named Jare, and they become involved in buying and selling a stimulant known to the Health Authority to be extremely dangerous: chilli pep