Japan has serious demographic problems. To solve them, they decided to open a special school in one of the cities. The main character Akihito got there along with his younger sister Umi. Now he has to save the city and its inhabitants.

Young girls from poor families can rarely count on a successful marriage. After all, their provincial suitors usually have neither influence nor sufficient funds. That's why attractive girls are so attracted to Edo, a city where aristocratic clans and rich nobles live.

The action takes place in a world created by Courreges Studios. The protagonist is Futaba, a second-year student. She is different from her classmates in that she has genitals of both sexes. Because of this, she faces difficulties: her sex drive overwhelms her and she is forced to masturbate in different places in the school.