A family who fell into a trash class because he could not pay taxes due to his father's death. My daughter Maria is sent to Girls Farm Adachi No. 4. It was a vocational training facility where girls competed to teach sex techniques and cultivate sex slaves. Every day being bullied by a rival classmate and made into a toy for instructors. The only way to get out of this hell is to be the property of a wealthy owner. One day, Maria receives a favorable contract story. However, a terrible secret was hidden behind it...

Ayaka and Saki are transfer students sent to "Girls Farm Adachi 4", a training facility that teaches girls how to have sex. The two of them possessed a transcendental technique that drives men crazy. The male employees are captivated by it, rival classmates oppose it, and the order in the farm collapses. Feeling suspicious, Yuko, the farm master, investigates the past of the two and learns of a secret plan. It was a forbidden human experiment that medically remodeled the girl's body and created the ultimate SEX machine...