Prison School Essentials includes episodes 1-12 of the anime directed by Tsutomu Mizushima.

When the prestigious all-girls Hachimitsu Private Academy becomes co-ed, five young men are the first males to attend. But the girls aren't so accepting of their new classmates. After the boys get caught peeping, The Underground Student Council enforces an absurd punishment. For a month, the boys must live within the school's very own penal system while enduring long, hard, and humiliating tasks.