Hachimitsu Private Academy's five male students have been released from their oppressive prison captors, allowing them to return to their ideal school lives surrounded by short-skirted girls. With their freedom restored, things could not be going better for the gang. Kiyoshi Fujino and Shingo Wakamoto have formed close bonds with their female classmates; Reiji Andou is the center of attention due to his masochistic quirks; and even Takehito Gakuto Morokuzu—notorious for defecating himself during class—befriends the klutzy yet like-minded Mitsuko Yokoyama. However, in contrast to his fellow ex-convicts, Jouji Joe Nezu struggles to readjust to student life, and the unlikely romantic success of his friend Gakuto pushes him to his wit's end. Feeling ostracized, he begins to wonder if life was better behind bars.

The tropical Seiren Island is a paradise for deviants: the infamous Pervert Law grants near-complete sexual freedom with almost no taboos or boundaries. With its various suggestive attractions, the Seirantou Health Organization (SHO) entices visitors while providing regular medical checks and contraceptive pills to ensure carefree enjoyment. However, for high school student Junnosuke Tachibana, the island is far from ideal. Having recently moved there with his younger sister, Asane, he cannot stand the empty, loveless sexual acts. To make matters worse, Junnosuke's abstinence attracts unwanted attention—and those who defy the law face punishment. Junnosuke soon crosses paths with Nanase Katagiri, a notorious island seductress. Surprisingly, instead of forcing herself on him, she helps him flee from the SHO. Together, they discover a secret group that exists for a singular goal: to destroy the SHO. Now equipped with a way to resist the unjust rules, Junnosuke and other kindred spirits set out to crush the Pervert Law.

Second part of two Hakuouki movies.

In a deadly terrorist attack, Arashi Mikami narrowly escapes death but loses everything in the process, including his family and best friend. However, the surgeon that rescues him is far from just an ordinary doctor—he commands a strike team known as Black Label whose task is to exterminate deadly criminals who have fallen too far. Filled with a new determination, Arashi joins the ranks of the vigilante organization. Black Label's targets are aplenty, as evil scum lurks everywhere—dangerous arms dealers, corrupt politicians, and shady gangsters all find themselves hunted by the extermination team. Although haunted by their dark and sinister past, all of the hunters are highly skilled at slaying their targets. In spite of the perilous lives the members live, Arashi and the gorgeous ladies surrounding him still manage to get caught up in a variety of sultry moments and racy hijinks. Though they face strong opposition, nothing can stop Black Label's objective of cleansing the world of ghastly evil.