Hearing that they could have a rare experience, Haruna and Riko visit the farm during their summer vacation out of curiosity. The man who manages the farm hands them a drink that they are told is fresh milk from the farm, and the two drink it down without a second thought. After about a minute, the drink's aphrodisiac properties and ability to change the body's structure to forcibly produce breast milk begin to take effect. The two stagger around like they're drunk, and do as the farm owner tells them, becoming livestock on the farm as new milk producers.