14Nippon TV6.0(6)

The Case Book of Arne

Name: The Case Book of Arne
Director: Keisuke Inoue
Genre: Animation, Mystery
Released: 2026-01-07
Rating: 6.0

アルネの事件簿

AnimationMystery

Watch Free

We checked 8 streaming services in India on 04 Jun 2026 at 10:09 IST

2026

1 Season

12 Episodes

Ended

About

Louis Hartmann loses his father, a private detective investigating a string of murders, leaving him all alone. Rumor has it that the murders are the work of a Grave-Digger Vampire. Louis isn’t keen on superstitions and vows to catch the culprit himself. That is, until a self-proclaimed detective, Arne Neuntöte, and his assistant, Lynn Reinweiß, appear. A new door is about to open for Louis…

#anime

Cast

Mariya Ise

as Louis Hartmann (voice)

Koki Uchiyama

as Arne Neuntöte (voice)

Aimi Tanaka

as Young Arne Neuntöte (voice)

Yuka Nukui

as Lynn Reinweiß (voice)

Yuki Sakakihara

as Zisye (voice)

Yuuki Shin

as Nachzehrer (voice)

Yoko Hikasa

as Amy (voice)

Seasons

Season 1

12 episodes2026

Episodes

Season 1

See all 12episodes →

Those Who Dig Pits for Others Will Fall In Themselves

Jan 7, 202623m7.0

Louis Hartmann joins forces with the members of the Arne Detective Agency to investigate his father's murder.

There Is Always Sunshine After the Rain

Jan 14, 202622m6.0

Lynn remembers the time she first met Arne and hired him to help investigate her father's suspicious behavior.

Misfortune Never Visits Alone

Jan 21, 202623m6.5

Arne makes a shocking discovery about Lynn's father and Gordon reveals the dark truth of the Reinweiß mansion.

Those Who Never Gamble Never Win

Jan 28, 202622m5.0

Lynn and Arne are both troubled by surprise encounters that threaten to alter the course of the investigation.

One Swallow Does Not a Summer Make!

Feb 4, 202622m4.0

Lynn and Arne assemble the servants to review the clues and sniff out the killers through deductive reasoning.

Time Will Tell

Feb 11, 202622m4.0

A distraught mermaid arrives at the detective agency searching for the reason why her lover tried to kill her.

Eating Whets the Appetite

Feb 18, 202622m3.5

Arne tracks down a jewel thief while Lynn investigates a series of disappearances connected to an art museum.

Desire and Love Make All Burdens Lighter

Feb 25, 202622m5.0

Lynn and Arne trace the mysteries of the missing men and lost piece of jewelry to their shocking conclusions.

Where does The Case Book of Arne rank today?

The Case Book of Arne is #2197 on the CineFlixo Daily Streaming Charts today.

Highest: #2197
Top 10: 0 days
Top 100: 0 days

Watch The Case Book of Arne Online Free — All Episodes in HD

Stream The Case Book of Arne online free in HD on CineFlixo. A popular animation and mystery series originally produced in Japonés and released in 2026, it's earned a solid 6.0/10 from 6 viewers worldwide.

About The Case Book of Arne

The Case Book of Arne Cast and Characters

The cast features Mariya Ise (as Louis Hartmann (voice)), Koki Uchiyama (as Arne Neuntöte (voice)), Aimi Tanaka (as Young Arne Neuntöte (voice)), Yuka Nukui (as Lynn Reinweiß (voice)), and Yuki Sakakihara (as Zisye (voice)). Their performances are a major reason The Case Book of Arne has built such a passionate audience.

Where to Watch The Case Book of Arne Online

On CineFlixo you can watch The Case Book of Arne free — no account, no credit card, no ads in the middle of the show. We stream the full series in 720p / 1080p HD, with subtitles when available, on any device: phone, tablet, laptop, or smart TV browser.

▶ Watch The Case Book of Arne Now

Why People Are Watching The Case Book of Arne

The Case Book of Arne flies under the radar but it deserves your attention. What makes it work is tight pacing that earns its twists. If you enjoy Japonés storytelling that doesn't follow the same tired beats, this is the kind of show you'll end up recommending to friends.

Frequently Asked Questions about The Case Book of Arne

Where can I watch The Case Book of Arne online for free?

You can watch The Case Book of Arne online free on CineFlixo. Just open the page and hit play — no signup, no subscription, full HD streaming on phone, tablet, or desktop.

How many episodes does The Case Book of Arne have?

The Case Book of Arne has 12 episodes across 1 season. All episodes are available to stream right here on CineFlixo.

Is The Case Book of Arne good? What's the rating?

The Case Book of Arne holds a 6.0/10 rating based on 6 reviews — a solid pick if the genre interests you.

Who is in the cast of The Case Book of Arne?

The main cast includes Mariya Ise, Koki Uchiyama, Aimi Tanaka, and Yuka Nukui, plus a strong supporting ensemble.

Is The Case Book of Arne available in Japonés?

Yes — The Case Book of Arne was originally produced in Japonés and that's the version you'll stream here on CineFlixo. English subtitles are provided when available.

When was The Case Book of Arne released?

The Case Book of Arne first aired in 2026.

Do I need an account to watch The Case Book of Arne on CineFlixo?

No. CineFlixo is free and you can watch The Case Book of Arne without creating an account. Sign-up is optional — only useful if you want a personal Watchlist or to comment on episodes.

Similar Series You Might Like

If you enjoyed The Case Book of Arne, check out Negative Positive Angler, Harmony of Mille-Feuille, From Bureaucrat to Villainess: Dad's Been Reincarnated!, From Old Country Bumpkin to Master Swordsman, and Paradise of Innocence.

Frequently Asked Questions

Where can I watch The Case Book of Arne for free?

You can watch The Case Book of Arne online for free on CineFlixo. All 12 episodes across 1 season are available to stream in HD without a subscription, signup, or paywall. Just open the show page and press play.

How many seasons and episodes does The Case Book of Arne have?

The Case Book of Arne currently has 1 season and a total of 12 episodes. The series status is "Ended", so the episode count may grow as new seasons are released. You can browse the full episode list on CineFlixo and continue watching from where you left off.

What is The Case Book of Arne about?

In which language is The Case Book of Arne originally available?

The Case Book of Arne was originally produced in JA. On CineFlixo the show is available in its original JA audio. Check the player options on the watch page for available subtitle tracks.

When was The Case Book of Arne first released?

The Case Book of Arne first premiered on January 7, 2026 (2026). The series has since concluded its run.