The year is 2030, and with 80% of the population now male, sexual crimes are on the rise. Amid this, a prison is conducting research into increasing the number of women. Yui, an inmate housed there, receives special treatment by sucking the warden's balls and satisfying his sexual needs with a crab-legged cowgirl position! She also contributes to the research into a drug that increases the number of women, masturbating with a vibrator to absorb their love juices! She breaks into the men's bath and receives a handjob to ingest their semen! She also accepts the final condition: if she impregnates a woman, she will be released. She gives a double blowjob to two middle-aged men's smelly dicks, making them erect, resulting in two consecutive creampies and pregnancy sex!