Set in the modern day, instead of the two genders of humanity being Male and Female, they are Female and Futanari. Additionally, futanari are rare, with only one out of 500 individuals being a futanari. Within the world there are massive campuses dedicated to housing expecting and new mothers, as well as futanari whom work for the nursery. Females seeking to conceive then petition the futanari currently working for the nursery. Due to the scarcity of futanari, females that petition offer money as a reward for copulating. Through the use of an app, futanari can see which females have selected them as potential mates, their price offers, and then select whether they wish to copulate with the female or not (Think like Tinder, but the sex is guaranteed and you're paid for it).
The player takes on the role of Red, whom is a young futanari whom has just entered adulthood and just joined her local nursery, The Guardian Angel. The player receives petitions, which they can answer to earn money, or they can just roam the town seeking out mates on their own. Which petitions are available to the player will be dependent on their skill levels, reputation, as well as game play choices.