OSHI NO KO Season 4 Reveals New Teaser Visual and Trailer for the Final Season

OSHI NO KO Season 4 has unveiled a brand-new teaser visual and trailer at the Ichigo Production☆Fan Thanksgiving 2026 event. The fourth season will serve as the...

The final stage of OSHI NO KO is getting closer.

After Season 3 brought another major chapter of Aqua and Ruby Hoshino's story to television, the anime has now returned with a new look at what comes next.

OSHI NO KO Season 4 has revealed a brand-new teaser visual and trailer.

Trailer

The announcement was made today, August 16, 2026, during the Ichigo Production☆Fan Thanksgiving 2026 event in Tokyo.

And there is one detail fans need to remember:

Season 4 is the Final Season.

The latest announcement does not reveal a premiere date yet, but it gives fans their first major new look at the conclusion of the anime adaptation.

Season 4 Is Officially the Final Season

The fourth season of OSHI NO KO was originally announced in March 2026 following the conclusion of Season 3.

At the time, the production announcement confirmed that Season 4 would be the Final Season, but no release date was given. 0

Today's event has now provided another major update.

A new teaser visual and trailer have been released.

However, the anime's official announcement still does not provide a broadcast date.

That means fans know the ending is coming, but they still do not know exactly when they will be able to watch it.

The New Teaser Was Revealed at a Major Fan Event

The latest announcement took place during the Ichigo Production☆Fan Thanksgiving 2026 event held in Tokyo on August 16.

The event was already expected to be an important occasion for OSHI NO KO fans.

Now it has become the place where the anime's Final Season received its latest promotional material.

The new teaser visual gives fans another glimpse at the characters who will carry the story into its final stage.

The official material also includes a new teaser video.

That makes this more than a simple production update.

The anime is actively beginning its promotional campaign for the final season.

Image description

The Final Season Has a Huge Story to Finish

The announcement carries extra weight because the original manga has already finished.

The manga, written by Aka Akasaka and illustrated by Mengo Yokoyari, ran from April 2020 until November 2024.

It concluded with 16 volumes.

That means the anime production has a complete story available to adapt.

The question is no longer whether the story will reach an ending.

It is how the anime will present that ending.

Aqua and Ruby's Story Is Coming to Its Final Chapter

At the center of OSHI NO KO are siblings Aqua Hoshino and Ruby Hoshino.

Their lives began under extraordinary circumstances.

Aqua was formerly Dr. Gorou Amamiya.

Ruby was formerly Sarina Tendouji.

Both were reincarnated as the children of idol Ai Hoshino.

Ai's murder became the event that shaped their lives.

Aqua became obsessed with discovering the truth behind his mother's death.

Ruby, meanwhile, pursued a career in the entertainment industry while carrying her own connection to Ai.

Their individual goals eventually became deeply intertwined.

Now the Final Season will bring that long-running story to its conclusion.

Aqua's Search for the Truth Remains Central

Aqua has spent much of the series trying to uncover the truth surrounding Ai's death.

His investigation has influenced almost every major decision he has made.

But the further Aqua gets into the entertainment industry, the more complicated his search becomes.

People lie.

Information is hidden.

Relationships are manipulated.

And Aqua has repeatedly had to decide how far he is willing to go to uncover the truth.

The Final Season will therefore represent the culmination of a storyline that has been developing since the very first episode.

Ruby Has Become Just as Important

Ruby's journey has developed in a different direction.

She wanted to become an idol.

That dream was heavily influenced by Ai.

But Ruby's understanding of the entertainment industry has changed dramatically.

The cheerful image she once had has been challenged by everything she has experienced.

Her connection to Aqua also continues to influence the story.

As the anime approaches its conclusion, Ruby's role could become one of the most important pieces of the final narrative.

Kana and Akane Remain Important

The Final Season is not only about Aqua and Ruby.

Two of the most important characters surrounding Aqua are Kana Arima and Akane Kurokawa.

Kana is a talented actress whose relationship with Aqua has developed throughout the series.

Akane is an equally talented performer who has demonstrated an exceptional ability to understand other people.

Both characters have their own ambitions and emotional conflicts.

Their relationships with Aqua have also been complicated.

The final season therefore has several character arcs that need to reach satisfying conclusions.

B-Komachi's Story Also Needs an Ending

Ruby's involvement with B-Komachi has become another major part of the series.

The group represents the idol side of the entertainment industry.

It also connects Ruby's career directly to the legacy of Ai.

The group has grown considerably since its early days.

With the anime now entering its final season, fans will naturally want to see where Ruby and B-Komachi ultimately end up.

Will Ruby reach the level of success she dreamed about?

Will B-Komachi remain together?

And how will the group's future connect to the story of Ai?

The Final Season has the opportunity to answer those questions.

Doga Kobo Returns

The anime adaptation has been produced by Doga Kobo since its beginning.

The studio is responsible for all three released seasons.

That means the Final Season is continuing with the established production identity of the anime.

The staff includes:

Director: Daisuke Hiramaki
Series Composition: Jin Tanaka
Character Design: Kanna Hirayama
Music: Takuro Iga
Animation Production: Doga Kobo

The continuity is important for the final chapter.

The visual style of OSHI NO KO has become one of the anime's defining features.

The Voice Cast Returns

The principal cast includes:

Takeo Otsuka as Aquamarine Hoshino
Yurie Igoma as Ruby Hoshino
Megumi Han as Kana Arima
Manaka Iwami as Akane Kurokawa
Rumi Okubo as MEM-cho
Lynn as Miyako Saito
Rie Takahashi as Ai Hoshino

These characters have been at the heart of the anime since its beginning.

Their performances will become particularly important in the Final Season because the story is approaching its most emotionally significant material.

The New Trailer Gives Fans More to Analyze

The new teaser trailer does not reveal everything.

That is probably intentional.

OSHI NO KO has always relied heavily on secrets, dramatic reveals and information that changes how viewers understand earlier events.

Showing too much of the final season could therefore spoil some of its biggest moments.

Instead, the new material gives fans a glimpse of the atmosphere surrounding the final chapter.

It reminds viewers that the story is approaching its end without explaining exactly how everything will unfold.

The Final Season Is Different From a Normal Renewal

There is an important difference between saying an anime has received another season and saying it has entered its Final Season.

A normal sequel can introduce another conflict and leave the door open for more.

The Final Season has a different responsibility.

It needs to close the story.

For OSHI NO KO, that means resolving years of character development and long-running mysteries.

Aqua's investigation.

Ruby's idol career.

Ai's legacy.

The complicated relationships between the main characters.

And the darker side of the entertainment industry.

All of those threads now have an endpoint.

Why the Release Date Matters

One of the biggest unanswered questions is the premiere date.

The March announcement did not include a release window.

Today's teaser announcement also does not reveal one.

So, for now, the official situation is simple:

OSHI NO KO Season 4 is confirmed and in production, but its release date remains unannounced.

Fans should therefore be careful with claims suggesting that the Final Season has already been scheduled for a specific month or year.

Until the official anime team announces the date, those claims should be treated as speculation.

The Manga's Ending Changes Everything

Because the manga has already concluded, readers already know that the story has a definitive ending.

Anime-only viewers do not.

That creates a particularly interesting situation for the Final Season.

The anime can now adapt the completed story without waiting for the manga to finish.

It also means the production team can structure the final adaptation around a known endpoint.

The challenge will be balancing everything that needs to happen with the pacing of the final episodes.

The Final Season Could Be the Anime's Most Important

The first season introduced the world.

The second expanded the entertainment industry side of the story.

The third pushed the characters into another major stage of their lives.

Now the fourth season has one enormous task:

Bring everything together.

That could make it the most important season of the anime.

Every major character relationship matters more now.

Every unanswered mystery becomes more significant.

And every new piece of information could change the way viewers understand the entire story.

What We Know Right Now

Detail	Information
Anime	OSHI NO KO
Upcoming Season	Season 4
Status	In production
Official Title	Final Season
New Teaser Visual	Revealed August 16, 2026
New Teaser Trailer	Revealed August 16, 2026
Premiere Date	Not announced
Animation Studio	Doga Kobo
Original Manga	Aka Akasaka & Mengo Yokoyari
Manga Serialization	2020–2024
Manga Volumes	16
Aqua Voice Actor	Takeo Otsuka
Ruby Voice Actor	Yurie Igoma
Kana Voice Actor	Megumi Han
Akane Voice Actor	Manaka Iwami
Streaming Platform	Crunchyroll

The Biggest Questions Before the Final Season

1. When will Season 4 premiere?

The official release date has not been announced yet.

2. How will Aqua's story end?

His search for the truth surrounding Ai has been one of the anime's central storylines.

3. What will happen to Ruby?

Her journey from Ai's fan to a successful idol has been one of the series' biggest character developments.

4. What happens to Kana and Akane?

Both characters have complicated relationships with Aqua and unfinished personal stories.

5. What will happen to B-Komachi?

Ruby's group has become a major part of her identity.

6. How will Ai's legacy affect the ending?

Even after her death, Ai remains the person around whom much of the story revolves.

Why Fans Should Pay Attention to This Announcement

The new trailer may not reveal a release date.

But it confirms something more important.

The Final Season is moving forward.

The anime has already entered the promotional phase for its conclusion.

After three seasons of watching Aqua, Ruby, Kana, Akane and the rest of the cast navigate the entertainment industry, fans are now approaching the final chapter.

There will be no Season 5 waiting afterward to continue the story.

This is it.

OtakuNaija's Take

The new OSHI NO KO Season 4 announcement feels different from the usual sequel announcement.

Because this time, there is no mystery about whether another season will follow.

This is the final one.

The new teaser visual and trailer released at today's Ichigo Production☆Fan Thanksgiving event make it clear that the anime is moving toward its conclusion.

The biggest question now is not whether Aqua will uncover the truth.

It is how that truth will affect everyone around him.

Ruby has her own ambitions.

Kana has her own struggles.

Akane has become deeply connected to Aqua's story.

And B-Komachi has become an important part of Ruby's life.

The Final Season has to bring all of those characters to the end of their journeys.

That is a huge responsibility.

But with the manga already complete and Doga Kobo returning, the anime has the material and production continuity needed to deliver its final chapter.

For now, there is only one thing missing:

the premiere date.

And when that date finally arrives, the final stage of OSHI NO KO will officially begin.

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Final Thoughts

OSHI NO KO Season 4 has officially entered its next stage of promotion.

The Final Season received a new teaser visual and trailer on August 16, 2026, during the Ichigo Production☆Fan Thanksgiving 2026 event.

The fourth season is confirmed as the final season of the anime, but an official premiere date has not yet been revealed.

That means the waiting game continues.

But after today's announcement, there is no doubt that the conclusion is getting closer.

Aqua's search.

Ruby's dream.