HBAD-590 A female college student, Hisui Matsumiya, rushed back to her hometown because her parents were sick and was gang-raped by a bunch of perverted old men.

Matsumiya, who was attending university in Tokyo, rushed back home upon receiving news that his mother, whom he had left behind in the countryside, had collapsed. However, he encountered old men waiting for young women. After being threatened, he was forced to perform oral sex, penetration, and facial ejaculation, processing the pent-up sexual desires of the men. But instead, using techniques he had learned in the city, he pleased the men, and he himself felt pleasure and reached orgasm repeatedly. He was a naturally lewd woman.