steals the show as Hana, seamlessly pivoting from a sweet, innocent schoolgirl to a terrifying, vengeful martial artist.
The catch? The boys must wear ridiculously thin, white school uniforms that become transparent when wet. Their opponents? The entire Upper Student Council (covering the school in soap) and, most dangerously, the —Mari, Hana, and Meiko—also wearing dissolving white tops.
Released on March 4, 2016, roughly six months after the TV series concluded, the Prison School OVA (officially Episode 13) is not a side story or a beach filler episode. It is the canonical continuation of the anime’s first season.
The episode ends not with a resolution, but with Kiyoshi realizing that to save his friends, he must literally "lose his mind." It sets up the Calvary Battle Arc perfectly but leaves viewers screaming for more. prison school ova
The Prison School OVA, "Mad Wax," is not for the faint of heart or those offended by excessive fanservice. However, for fans of the show’s unique blend of melodrama, comedy, and intense psychological shenanigans, it is a must-watch addition that perfectly encapsulates the chaotic charm of Hachimitsu Academy.
Released in 2016, this "Original Video Animation" is more than just extra fan service—it’s actually . While many anime OVAs are just "filler" beach episodes, Mad Wax
A common question among viewers is whether the OVA is canon. steals the show as Hana, seamlessly pivoting from
Enter the . Officially titled Prison School: Mad Wax (or volume 8 of the Blu-ray/DVD release), this single-episode OVA is the missing link between the anime’s chaotic finale and the manga’s next major arc. However, calling it "just an extra episode" would be a disservice. For many, the Prison School OVA is the true emotional and comedic climax of the anime adaptation.
Where to Watch / Availability
Set immediately after the boys are released from the school's prison, the OVA focuses on their struggle to adapt to "normal" life on the Hachimitsu Academy campus. Their opponents
While the other boys are enjoying their freedom, Joe finds himself unable to adjust to normal life. He misses the confinement, the structure, and most importantly, the extreme punishments inflicted by the Underground Student Council.
The is not a throwaway extra. It is the soul of the series distilled into a frantic, sweaty, silent heist movie. It has the highest "laughs per minute" ratio of any episode in the adaptation.
If you are interested in diving into the original storyline, you might want to look at the Prison School manga on MangaDex, which continues far beyond the anime.
The Prison School OVA is a single-episode sequel titled (often packaged simply as Episode 13). It was bundled exclusively with the limited-edition release of the 20th volume of the original manga in Japan on March 4, 2016.
: His attempt to commit a crime "so extreme" just to get back into the prison block highlights the series' commentary on how people seek comfort in familiar pain rather than the uncertainty of freedom. Kiyoshi and Hana: The Evolution of Obsession