[case.I Takanashi Aoi] The Distorted Love of a Noble Heir — "Overnightz" Subject Report on Being Trained as a "Dog"

With just one month remaining until the release of Rejet’s new situation CD series “OVERNIGHTZ” (Overnightz), the stage is set for a powerful audio experience. Launching in October 2025 with three volumes total, each installment delivers rich narratives and lavish orchestral soundscapes, creating an immersive listening journey.

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This time, 4Gamer will present a three-part series of reports in the form of participant observations to convey the essence of “OVERNIGHTZ.” We’ll summarize insights and key points gathered from actual listening sessions, serving as a record of our experience.

The landmark first installment focuses on “case.I Takanashi Aoi (CV: Yuuki Ono)”, set for release on October 22. At the end of this article, we also include comments from insiders who listened to the full version in advance—be sure to check them out too.

Participant Profile: The Inner Conflict and “Twist” of a Noble Heir

This time, our participant is Takanashi Aoi, a noble heir currently attending Imperial University. What exactly constitutes his “twisted nature,” and why did he come to receive the experimental drug “Ortancia”? Numerous mysteries surround this story—something I personally had been eagerly anticipating even before listening.

Takanashi Aoi (CV: Yuuki Ono)

A member of an old aristocratic family.
Aoi was taken in as a child by the Takanashi household, being the son of a concubine. He endured constant scorn from his three half-sisters—his mother’s legitimate daughters—who despised him for not sharing their bloodline. As bullying escalated, Aoi began to embrace and cultivate his own “twisted” nature.

Years later, he focused on studying at Imperial University, seemingly having found peace in a tranquil life.
On a rainy night, the girl known as “” is picked up by him—though she has no idea what awaits her next.

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PROFILE Age: 21 | Height: 180cm | Weight: 68kg | Likes / Dislikes: Coffee / Anpan

Synopsis of case.I Takanashi Aoi

Once a family of great prestige, the Takanashi clan has now declined to near bankruptcy. As its sole heir, Aoi lives in the family mansion alongside “.”

Aoi refers to her as “Pochi” and treats her like a dog—taking her for walks, among other things. At first glance, their life appears peaceful. Yet signs of unrest are evident everywhere: rain falls continuously outside, while chains and collars remain conspicuously placed within the mansion.

Eventually, visitors arrive at Aoi’s residence. They turn out to be his sisters, who attempt to take “” away—what happens next?

Aoi’s Past and the Reason Behind “Training”

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Rejet’s hallmark originality remains intact in this work. Here, "" is treated not as a human but as another kind of being, creating an unusual relationship where love and training coexist.

Early on, Aoi comforts the awakened “” with gentle words like “There, there.” On the surface, it appears to be a calm morning scene—but this moment powerfully conveys a sense of unease in how she is treated. Furthermore, the use of dummy head microphones makes spatial perception extremely vivid, greatly enhancing realism.

Though Aoi’s daily life initially seems stable, subtle signs of madness begin appearing throughout. For instance, during a coffee-drinking scene, he casually mentions roasting "’s nails" together with the beans, immediately revealing his twisted nature.

Additionally, details from his profile gradually come to light—the circumstances surrounding his birth. As we learn more about how Aoi was mistreated by his sisters in childhood and what retaliatory actions he took, a growing sense of unease permeates the narrative. The 60-minute listening experience felt surprisingly short, charged with constant tension.

CD BLACKBOX CD “OVERNIGHTZ” case.I — Dominated by His Distorted Love
• Release Date: Wednesday, October 22, 2025
• Cast: Yuuki Ono
• Format: Two-disc CD set
• Price: ¥4,500 (tax included)

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Participant Results: Analysis of Each Ending in case.I Takanashi Aoi

After regaining consciousness in a hospital room, participant Aoi is confronted with a question from the mysterious beastman Tafune. From this moment onward, the story undergoes a major turning point. Below are our observations on each ending (click or tap on your preferred one to explore):

I: 01-001-7141111362714404

This route reveals Aoi’s meeting with “” and the circumstances that led him to become a test subject for “Ortancia.” It shows two individuals burdened by their distortions finding hope for the future—strongly emphasizing redemption. During listening, a deep emotional warmth was felt, leading to an ultimately comforting ending.

Moreover, across all routes, a recurring theme is clear: “Medication becomes poison if not used properly,” forming the foundational principle of the entire story.

II: 01-002-123304946111514131712104

This route most clearly exhibits Aoi’s psychological distortion. Delving into the inner workings of the Jade Tower significantly deepens the world’s depth. In its final moments, his intense longing for “” is portrayed with such rawness that it leaves a sharp emotional wound on listeners.

III: 01-003-83233314

In this route, Aoi regains memories he had forgotten. The suffering tied to his origins comes into full view, and the poignant nature of his remorse is powerfully emphasized. This ending leaves behind a heavy, lasting resonance.

Each conclusion displays its own unique tone. In every one, Aoi’s past and inner feelings are vividly portrayed—leaving listeners with deep emotional echoes after listening.

Comments from Early Test Listeners

Here we collect candid impressions from 4Gamer staff and other insiders who listened to the full version in advance. These reflections should prove valuable for readers considering a purchase or those who’ve already pre-ordered.

Rejet Public Relations Staff
While you might wonder whether Aoi’s love is directed toward her as a human or as a dog, every 90-minute session conveys an overwhelming sense of being deeply cherished.
Though he appears cool and composed at first glance, the gentle tone of his voice or subtle smile that emerges unexpectedly feels incredibly sweet—so much so it instantly makes you think, “Whether she’s human or dog, I don’t care anymore.”
The sweetness only amplifies how intense and twisted his inner darkness truly is. But because we feel such deep love at key moments, even harsh treatment becomes tinged with affection. That’s pure Rejet magic!
There are plenty of scenes where you might exclaim aloud: “Is it really okay for him to do that just because she’s a dog!?”. So be mindful—use the correct dosage and choose your listening environment wisely!

Rejet Sales Staff
Is he treating her as human or as a dog?
The descriptions, lines, and sounds throughout often make you question this—constantly leaving me bewildered.
You can’t grasp everything from just the opening; instead, you’re drawn into a story filled with mystery, making it thrilling to follow along.
As we gradually learn more about the setting and circumstances, many moments evoke deep sorrow and emotional pain.
Each route is so compelling that I found myself completely absorbed. It reminded me of Rejet’s style from around ten years ago—something deeply nostalgic for me personally.
Also, I appreciate how not all endings are happy ones.

Rejet Business Staff
Though I read the script beforehand, I imagined Aoi as a quieter, calmer individual. But hearing him voice-only completely changed my perception—he’s far more expressive and human than I expected.
His usual calm, low tone sharply shifts into passionate intensity in emotional moments—this range is truly captivating.
Beneath his composed demeanor lies madness, possessiveness, and an unexpectedly tender sadness—all coexisting within his voice.
Combined with the breath sounds and whisper humidity unique to dummy head microphone recording, it feels as if you’re actually being dominated in reality.
The sudden shift from a calm tone to whispers at zero distance is absolutely overwhelming—this perfectly embodies what “listening-induced distortion” means. Highly recommended!
Of course, if you’re listening as “” (a dog), please take responsibility for your own walk—just saying (laughs).

Rejet Production Staff
This work truly shines with Rejet’s distinctive, bold worldview.
The endings are neither simple happy nor tragic ones—they leave a quiet, lingering resonance in the heart.
I’m sure you’ll inevitably think of Aoi whenever it rains.
Because of its complex storytelling, the deeper you listen, the more clearly the world of “OVERNIGHTZ” and Aoi’s inner state become apparent—definitely worth multiple replays!
Listening after reading the character profile on the official site makes immersion even deeper.
Being dominated by Aoi’s distorted love and called “Pochi”—if there is love in that, perhaps such a twisted, dreamlike world isn’t so bad after all.

Stellarous Staff
This kind of scenario—something I never thought existed!
Beyond the charm of Takanashi Aoi as an heir destined to rule and carry an intimidating aura befitting his status, what makes him especially endearing is how tenderly he behaves only toward “"—who happens to be a “dog.”
While Rejet has previously featured characters like “Emu-chan” or “female pig,” hearing someone speak directly to you while treating you as a dog evokes entirely different emotions than when listening from a human perspective.
There’s the phrase “sweet and sour”—and Aoi’s treatment truly embodies that duality. I find his multifaceted nature deeply compelling: being gentle only with “” yet strict, even harsh, in training her like a master—each line makes you wonder what kind of version he’ll show next. It’s an incredibly engaging script.
As you gradually uncover more about him and the world, your perception shifts—and so does how he interacts with you. The story feels as weighty as reading a full novel, offering new discoveries every time you replay it. I find myself wanting to listen again and again.
The unique atmosphere—enhanced by memorable sound effects like rain and background music—is addictive.

4Gamer Bajou
I intentionally listened without reading the synopsis first.
At first track, I genuinely believed “” was a real dog—but gradually began sensing something off. When I finally realized the truth, I couldn’t help but gasp aloud: “Uwaaah!”
If she really were just a dog, his overprotectiveness would be adorable… But then suddenly, hints of madness emerge—honestly scary! Yet there’s also a calm ending with hope and comfort. That was reassuring.
Yuuki Ono’s performance is outstanding—the flat tone fits Rejet’s signature style perfectly.

4Gamer Sagasan
I was genuinely shaken by the power of dummy head microphone again after so long.
The sudden glimpse of madness—this contrast gives me chills. Their relationship is unique: sweetness mixed with tension, making it impossible to look away. Different endings are also fun—the one offering redemption suits my taste best.
This is a masterpiece full of Rejet’s signature drama. “Ah yes, this world again,” I thought.

4Gamer Akutagawa
I’ve been eagerly waiting for this moment—thank you so much.
Perhaps I’ve been quietly preparing myself all along just for this feeling.
All the time I’ve followed this project, it was to finally meet this surge of emotion in my chest.
If I could be completely his alone, nothing else would matter.
Please guide me more firmly.
Every time Aoi’s voice fills my headphones, I lose myself entirely in reality.
The experience this work offers is vivid—every bit of tenderness and sorrow hits with full force.
Since discovering Rejet’s works, nothing has ever stirred my heart quite like this again.
I want more—but also want to be teased. Only this work can make me feel that way.
Thank you, Rejet. Welcome home, my madmaker (Shia).
My ideal madness (Ai) has returned.
I’m already looking forward to the new days ahead.

Overall, “case.I Takanashi Aoi” left many listeners deeply moved by Aoi’s persistent pursuit of love despite his inner distortions—profoundly affecting their hearts. Each ending portrays a different form of “love,” and interpretations vary as widely as there are listeners—an outstanding hallmark of this work’s appeal.

Next time, we’ll feature “case.II Utsujii Rino (CV: Yuuki Kaji)”, scheduled for release in November. With an entirely new participant set to unfold a fresh story—something different from Aoi’s arc is surely waiting. Stay tuned for more!

Official “OVERNIGHTZ” Website

(C) Rejet