Save the world with my cunt! My vaginal fluid has been nationally certified as a cure for old men turned into sex addicts by sperm viruses, so to eradicate it, I diligently perform intense sex treatments every day. (Sone-819)

In 20XX, a deadly sperm virus broke out globally. While researching treatments, evidence emerged worldwide proving that a certain number of women's vaginal fluids contained a potent drug component. It was then demonstrated that if women with this therapeutic vaginal fluid engaged in sexual intercourse, and the man ejaculated while experiencing orgasm, a complete cure could be achieved. Now, signs of the virus's eradication appeared worldwide, but in Japan, the remaining three severely affected patients were hospitalized in isolation facilities. However, one day, when the virus's resistance was strong and treatment was extremely difficult, a savior appeared. A girl in her early teens… but she received a notification from the government, having undergone examination and been identified as a woman with a special constitution possessing the therapeutic drug. After discussing it with her mother, she resolved to go to the facility for training. During this training, she discovered that she herself was a vagina that secreted vaginal fluid containing super-strong antibodies. She managed to suppress the nauseatingly lustful patients who, during attacks, lost control and rampaged like demons of lust, ejaculating with her vaginal fluids and a jackhammer-like thrusting motion. Even with her cheeks licked and her face splattered with foul-smelling, filthy semen, she continues to heal the hearts of one hardcore sex addict after another. Can she really save this country… save this world with her cunt…? This is the story of a chosen, strong girl.