Anime Like Pet
If you loved Pet's Animation and Mystery storytelling, these anime deliver a similar experience — selected for art style, narrative depth, and emotional impact. Each includes where to stream it now.
★ Top Picks

xxxHOLiC
Kimihiro Watanuki is a high school student plagued by ayakashi spirits, both of which are invisible to everyone else but him. The series begins when Watanuki stumbles, seemingly by chance, into a shop that grants wishes. The shop is owned by Yūko Ichihara, a mysterious witch of many names and esoteric renown. For a price, she offers to grant Watanuki's wish to be rid of the spirits. The price, according to Yūko, must be of equal value; so, as payment, he must become Yūko's temporary, part-time cook and housekeeper.

Darker than Black
Ten years ago, a mysterious spatial anomaly now known as "Heaven's Gate" appeared in South America, shortly followed by the opening of "Hell's Gate" in Tokyo altering the sky and wreaking havoc on the landscape. The real stars disappeared, replaced by false stars. During this time, people possessing various special abilities — called "Contractors" — emerged, each capable of different supernatural feats. Following the disastrous Heaven's War, the United States lost its dominant position as a superpower to a mysterious organization named the Syndicate. The story revolves around a Chinese contractor codenamed "Hei" as he undertakes various espionage and assassination missions in Tokyo.

Rozen Maiden
Jun is a total recluse who won't take a step outside his house and only loves online shopping. When Jun winds up a doll that suddenly appears in his room because of his mail-orders tendencies, he has no idea what he's in for. The doll comes to life and proclaims herself to be 'Shinku'. She later binds Jun to her as a medium, her counterpart, and her magical power source, in an attempt to save his life. And so starts the beginning of a chaotic life for the Sakurada household as more Rozen Maidens arrive on their doorsteps. But what are the Rozen Maidens and why do they exist? And will Jun learn to open up his heart and face his fears? The main characters are: Sakurada Jun - The main lead of the story who has to learn to face his fears, thanks to the arrival of Shinku. The interaction between Jun and Shinku are often funny and at times, touching.

Hell Girl
A supernatural system allows people to take revenge by having other people sent to Hell via the services of a mysterious entity and her assistants who implement this system. Revenge, injustice, hatred, and the nature of human emotions are common themes throughout the series.

ACCA: 13-Territory Inspection Dept.
"ACCA" is a giant unified syndicate residing in a kingdom split into 13 autonomous regions. ACCA was formed back when there was threat of a coup d'etat, and has continued to protect the peace for almost one hundred years. Jean Otus, vice-chairman of the inspections department at ACCA headquarters, wanders through the 13 districts, checking to see if there is any foul play afoot. His quiet everyday life slowly gets swallowed up into the world's conspiracies!

Parasyte -the maxim-
A species of parasitic aliens descends on Earth and quickly infiltrates humanity by entering the brains of vulnerable targets; insatiable beings that gain total control of their host and are capable of transforming themselves to feed on unsuspecting prey. High school student Shinichi Izumi falls victim to one of these parasites, but the creature fails to take over his brain and ends up in his right hand.

The Foolish Angel Dances with the Devil
Determined to protect his demon world from heavenly angels, demon Masatora Akutsu heads to earth in search of a charismatic human to rally his kin. Masquerading as a high schooler for his recruitment mission, he's captivated by the lovely Lily Amane. But he's in for a wild celestial surprise, because she's his archnemesis—an angel—and she's set on reforming his demonic ways!

Mononoke
The Medicine Seller is a deadly and mysterious master of the occult who travels across feudal Japan in search of malevolent spirits called mononoke to slay. When he locates one of these spirits, he cannot simply kill it; he must first learn its Form, its Truth, and its Reason in order to wield the mighty Exorcism Sword and fight against it. He must begin his strange exorcisms with intense psychological analysis and careful investigative work—an extremely dangerous step, as he must first confront and learn about the mononoke before he even has the means to defeat it.
More Anime Like Pet

BEASTARS
In a world where beasts of all kinds coexist, a gentle wolf awakens to his own predatory urges as his school deals with a murder within its midst.

No Longer Allowed in Another World
Pulled into an otherworldly adventure with cute sidekicks and superpowers, you’d think Osamu hit the jackpot. Nope! From a time before pixels, the early 20th-century gloomy author just wants to find a quiet place to meet his maker, not to rack up XP. Sadly, his poetic demise is constantly thwarted by inconvenient heroics. Dive into the hilariously tragic life of the most reluctant hero!

Flowers of Evil
The corrupt pure-love story revolves around Kasuga Takao, a bookish boy who loves the poems of Charles Baudelaire (the original author of the poetry collection "Les Fleurs du mal" or "Flowers of Evil"). One day after school, he discovers and steals the gym clothes of Saeki Nanako, the girl he has a crush on. However, he learns that Nakamura Sawa, a girl he loathes, happens to catch him in the act. Nakamura blackmails Kasuga into a contract, or else she will reveal his secret.

Dark Gathering
The story centers on Keitarou Gentouga, who has the ability to be a spirit medium. In junior high school, he got someone else wrapped up in a spirit possession incident, and he has been a shut-in for more than two years. As he reintroduces himself to society as a private tutor, he meets a genius girl named Yayoi Houzuki. Yayoi is instantly able to tell that Keitarou has skill as a spirit medium, and she invites him to go with her to a haunted location. The two then start their journey capturing evil spirits.

Magical Girl Site
Aya Asagiri is a middle school girl who has problems both at school with bullying and at home from physical abuse by her brother. While browsing online, a website pops up on her computer featuring a creepy looking person. This person appears to take pity on her, and announces that she has granted Asagiri magical powers.

7SEEDS
Shy Natsu awakens as part of a group chosen to ensure the survival of humanity. Together, they have to survive on a changed Earth.

Wonder Egg Priority
Ai, a young girl with shut-in tendencies, who tries not to interact with others. She keeps one of her eyes hidden behind her hair. One day, she happens to stop by a deserted arcade, where she meets "Aka." Spinning the gacha at their urging, she acquires a "Wonder Egg," and from that moment, her fate begins to change...

Aoi Bungaku Series
An animated adaptation of six classical Japanese literature pieces, including No Longer Human (Ningen Shikkaku) and Run, Melos (Hashire, Melos) by Osamu Dazai, Kokoro by Natsume Souseki, Hell Screen (Jigoku Hen) and The Spider's Thread (Kumo no Ito) by Ryunosuke Akutagawa and In the Forest, Under Cherries in Full Bloom (Sakura no Mori no Mankai no Shita) by Ango Sakaguchi.

Taboo Tattoo
The story follows Justice Akazuka (a.k.a. Seigi), a young man who is good at martial arts. One day, Seigi rescues a homeless old man from some thugs, and the man gives him an object that imprints a tattoo on his palm. However, it is not an ordinary tattoo, but a special weapon that gives Seigi supernatural powers such as warping space-time. Seigi then meets a female American agent named Izzie, whose duty is to recover the tattoos. He decides to help her and gets wrapped up in a cross-national conspiracy.

Boogiepop and Others
There is an urban legend that tells of a shinigami that can release people from the pain they are suffering. This "Angel of Death" has a name—Boogiepop. And the legends are true. Boogiepop is real. When a rash of disappearances involving female students breaks out at Shinyo Academy, the police and faculty assume they just have a bunch of runaways on their hands. Yet some students know better. Something mysterious and foul is afoot. Is it Boogiepop or something even more sinister...?

ID: INVADED
Sakaido is a genius detective who can track down any criminal. But when his daughter is murdered, revenge lands him on the other side of the law. Now in prison, he helps the police solve mysteries using a system that invades a person’s identity. Little by little, a trail of blood forms, and it all leads back to his daughter’s murderer.

Shiki
Sotobamura is a small village with around 1300 residents; so small the village isn't even connected to a single highway. An isolated village in which old customs, such as the burial of the dead, are still practiced. One day, the bodies of three people are found dead. Although Ozaki Toshio, the village's lone doctor, feels uncertain, he treats the deaths as a normal occurrence. However, in the days following, the villagers start to die one after the other.
Why These Anime Are Similar
These recommendations share core qualities with Pet (2020): Animation and Mystery themes, comparable animation style, and similar narrative pacing. NoBadPicks uses TMDB collaborative filtering, genre matching, and AI analysis to surface anime most likely to resonate with fans of Pet.
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