Junnosuke Tachibana and his sister Asane return to Seiran Island, their childhood home, after their parents' deaths. Upon arrival, they discover the island enforces a strict "Pervert Law" that mandates premarital sex, with teenagers regularly participating in orgies as a legal requirement. Junnosuke is deeply disgusted by this law and refuses to comply, holding firm to his belief in abstinence before marriage.

Determined to oppose the law, Junnosuke forms a resistance group called No Love No Sex (NLNS), also known as the Anti-Copulation Front, gathering like-minded students who reject the island's sexual mandates. Despite his stance, Junnosuke faces persistent advances from several girls attracted to him, including his own sister Asane, complicating his efforts to maintain celibacy.

One day, while evading enforcers who uphold the Pervert Law, Junnosuke, Asane, and their ally Hinami are confronted in the woods. When an enforcer attempts to coerce Hinami, Junnosuke points out that sex with minors is illegal. Hinami proves her age by showing her student ID, leading to the arrest of the enforcer for pedophilia. The trio then flees through the forest, with Asane disabling the enforcers' tracking devices and radios. They use gadgets such as smokescreens and receive unexpected help from a mysterious girl named Fumino Kotoyose, who snipes the enforcers with rubber bullets, allowing their escape.

Afterward, Hinami is invited to join the NLNS bunker, a secret underground base equipped with computers and 3D printers, which serves as their headquarters. She agrees only after Nanase, another member, explains that abolishing the Pervert Law will allow her to choose her sexual partners freely. The group recalls a message from an old man indicating that Fumino is the key to ending the law. However, Asane cannot find any records of Fumino, so they plan to hack into the enforcers' computer system to locate her.

Meanwhile, the enforcers intensify their search for Fumino in the woods. She is rescued by Misaki, who shelters her in her home. At school, a mandatory "penis inspection" and orgy are held, but Junnosuke avoids participation by wearing a chastity belt and claiming Nanase has already "claimed" him. The student council president, Touka Reizeiin, delivers a speech promoting sex as a unifying force and announces an upcoming athletic competition.

Junnosuke and Nanase later discover the underground base inside a cave connected to the school, which becomes their operational center. They use this base to plan their resistance activities and develop unconventional weapons shaped like sex toys, provided by a mysterious benefactor who asks only that they find and protect Fumino to help abolish the law.

As the story progresses, the NLNS members face multiple confrontations with the enforcers and other proponents of the Pervert Law. In one intense sequence, the enforcers attempt to capture Fumino, but the group uses their gadgets and teamwork to fend them off. Junnosuke personally overpowers several aggressive girls from the Student Services (SS) who try to force him into sex, defending his pride and maintaining his resolve.

In Misaki's route, a significant twist occurs when Teshima, a powerful figure, brainwashes nearly the entire island population into accepting a new law where all sex must be paid for. This brainwashing is achieved through his sexual prowess, and the only way to reverse it is by providing even more satisfying sexual experiences, complicating the resistance's mission.

Throughout the series, Junnosuke faces pressure from antagonists who urge him to abandon his celibacy and "solve his frustrations" by submitting to the island's sexual culture. Touka argues that by engaging in sex, Junnosuke could better understand himself and take revenge on those who have harmed his loved ones. Hitoura, another antagonist, wants Junnosuke to become his right hand in expanding the Pervert Law nationwide.

Despite these pressures, Junnosuke remains committed to the NLNS cause. The group continues to hack into enforcer systems, gather intelligence, and recruit allies. They uncover more about the island's history and the origins of the Pervert Law, revealing that Fumino holds the key to dismantling the oppressive system.

In the climactic sequences, the NLNS orchestrates a coordinated effort to expose the law's injustices and rally the islanders against it. They use their underground base to broadcast messages and organize protests. Fumino emerges as a symbol of hope and resistance, inspiring others to question the law.

The final confrontation involves a large-scale battle between the NLNS and the enforcers, with Junnosuke leading the charge. Using their inventive weapons and strategic planning, the resistance manages to disable the enforcers' control systems. Junnosuke confronts the main enforcer leader, defeating him in a tense fight that combines physical combat and psychological resolve.

With the enforcers defeated and the Pervert Law dismantled, the island begins to transition away from its compulsory sexual culture. Junnosuke and Asane, along with their friends, start rebuilding their community based on freedom of choice. The series ends with the NLNS members reflecting on their journey and looking forward to a future where love and sex are matters of personal decision rather than legal obligation.

Fumino Kotoyose is a mysterious girl who is considered the key to abolishing the island's compulsory premarital sex law. She is not found in official records, prompting the protagonists to plan hacking into enforcer computers to find her. Fumino is rescued and sheltered by Misaki, indicating her importance in the resistance against the law.

Junnosuke, disgusted by the law, refuses to participate in the mandated sexual activities. He forms a group called No Love No Sex (NLNS) or the Anti-Copulation Front to protest the law. He also uses tactics like wearing a chastity belt and pretending to be claimed by Nanase to avoid participation in school inspections and orgies.

The underground base, discovered by Junnosuke and Nanase after escaping enforcers, serves as the headquarters for the Anti-Copulation Front. It is equipped with computers, 3D printers, and facilities to stay overnight, providing a strategic hideout and operational center for their resistance activities.

The antagonists include the enforcers of the Perverted Ordinance and figures like Governor Hitoura and the student council president Touka Reizeiin. They promote the compulsory sex law and attempt to coerce or manipulate Junnosuke, with Hitoura wanting him as his right hand to expand the law nationally, and Touka encouraging him to conform by engaging in sexual acts.

Junnosuke and his group face constant pursuit by enforcers who uphold the Perverted Ordinance, including arrests and tracking attempts. They must evade capture using gadgets and assistance from allies like Fumino. Socially, they confront widespread acceptance of the law, pressure from peers, and the sexual advances of several girls, including Junnosuke's own sister, complicating their resistance efforts.

Nukitashi the Animation (2025) is not family friendly. It contains severe sexual content and nudity, with continuous and explicit depictions integral to the plot. The show is set on an island where sex is mandatory by law, and the story involves adult themes around this premise.

Potentially objectionable or upsetting aspects for children or sensitive viewers include:

• Explicit sexual content and nudity shown frequently and graphically.
• Themes involving sexual coercion and persecution related to the island’s law.
• Mild violence and gore, though not the main focus.
• Moderate profanity throughout the series.
• Mild frightening or intense scenes, but these are less prominent.

The anime is broadcast in multiple versions, including a heavily censored one and an uncensored "perverted version" on AT-X. There is also an audio-only broadcast version on Tokyo MX-1 to avoid visual sexual content, indicating the visual material is quite explicit.

Given these factors, Nukitashi the Animation is intended for mature audiences and is unsuitable for children or viewers sensitive to sexual content and adult themes.