Adult PC Game: Human Farm -Practice Section- v1.00 by Tokkuri Kurage Archive

In a world where human farms are operated out in the open. The main character, who wants to become a ""milker"", visits a farm for practical training.
While the trainees tour the facilities, trouble occurs!
The training session ends abruptly, and, as our hero wanders around the facility, he meets a slutty older sister-type cow named Ayana.
Ayana ends up liking him and offers a more hands-on practical training!
Will he be able to milk her well?"​