These games have sex scenes that involve prostitution, that is, one of the participants take place in the activity for monetary or similar gains.

Prostitution is the business or practice of engaging in sexual relations in exchange for payment or some other benefit. Prostitution is sometimes described as commercial sex.

A common form of prostitution in Japan is called JK business (Enjo-kousai) that means "compensated dating" and is a practice where older men give money and/or luxury gifts to attractive women for their companionship and possibly, for sexual favors.