The year is 2030, and with 80% of the population being male and sexual crimes on the rise, there is a prison that is conducting research into increasing the number of women. In order to receive special treatment, Yui, an Yui housed there, sucks the warden's balls and relieves his sexual needs in a crab-legged cowgirl position! She also lends her body to the research into a drug that increases the number of women, masturbating with a vibrator to get love juices! She breaks into the men's bath and receives semen with a handjob! She agrees to the final condition that she will be released if she impregnates a woman, and she gives a double blowjob to two middle-aged men's smelly dicks, giving them two consecutive creampies that will get her pregnant!