Grand Blue Dreaming Chapter 113: Release Date, Speculation, and Ultimate Chapter 112 “The Peach Garden Oath” Breakdown

There are chapters of Grand Blue Dreaming that make you laugh.

Then there are chapters that make you stop, stare at the page, and wonder how Kenji Inoue and Kimitake Yoshioka managed to turn a bunch of college idiots into the protagonists of what looks like a low-budget dystopian horror story.

Chapter 112, “Plans,” somehow does both.

I have been following Grand Blue Dreaming for a long time, and I genuinely thought I had reached the point where nothing this series could do would surprise me anymore. I was wrong. The entire Project SOX sequence takes the franchise’s usual obsession with drinking, diving, romance, and virginity anxiety and pushes it into completely ridiculous territory.

And that final Peach Garden Oath?

Absolutely insane.

With Grand Blue Dreaming Chapter 113 expected on October 6, 2026, the big question isn’t whether the situation will get worse. Of course it will. The real question is how Iori and the rest of the engineering boys are supposed to survive after Yamamoto has apparently turned their bedrooms into automated anti-romance death traps.

Here’s my personal breakdown of Chapter 112 and what I think could happen next.

Grand Blue Dreaming Chapter 113 Release Date

According to the current serialization schedule, Grand Blue Dreaming Chapter 113 is set to release on October 6, 2026.

The manga continues its monthly run in Kodansha’s Good! Afternoon magazine, with the English release available digitally through K MANGA.

Naturally, manga schedules can change because of magazine breaks or production issues, so it’s worth checking the official release platform when the date gets closer.

But assuming everything stays on schedule, October 6 is the date I have circled.

Chapter 112 Was Basically a Declaration of War

What makes Chapter 112 so funny is that the chapter begins with something that seems almost normal by Grand Blue standards.

Iori is worrying about Chisa.

Specifically, he’s worrying about the possibility that a marriage document involving Chisa could actually mean they’re legally married.

That alone is enough to send Iori into one of his classic mental breakdowns.

His imagination immediately goes into overdrive. He pictures Chisa moving into his room, taking over his daily life, and casually ordering him around as if they’ve already been married for years.

It’s exactly the kind of ridiculous romantic nightmare that only Grand Blue could turn into a legitimate source of psychological terror.

But while Iori is worrying about his possible future wife, something much more horrifying is already happening behind his back.

His friends are building a surveillance state.

Yuu Mitarai Has a Christmas Problem

One of my favorite parts of the chapter is how Yuu Mitarai gets dragged into the same nightmare.

Yuu has secretly arranged a Christmas date with Rie.

Normally, that would be good news.

In the engineering department, however, having a girlfriend and making romantic plans is apparently equivalent to signing your own death certificate.

Yamamoto immediately senses that something is wrong.

The question about whether Mitarai has any “plans” turns into psychological warfare almost instantly.

Yuu knows.

Iori knows.

The audience knows.

If the others discover that Yuu has a Christmas date, he’s finished.

The funniest part is that everyone is so paranoid that nobody even needs to say what they’re thinking.

Meanwhile, Kohei Is Having a Completely Different Crisis

Kohei’s subplot might be the most Grand Blue thing imaginable.

While everyone else is worrying about real-world relationships and possible physical death, Kohei is mourning an anime-related tragedy.

He’s dressed like he’s attending a funeral, clutching a cross, and staring at his phone while his beloved 2D character appears on screen.

Iori basically assumes Kohei is the lucky one because he seems completely detached from the chaos.

He isn’t.

He’s just suffering from a different kind of emotional damage.

That contrast is one of the reasons the chapter works so well. Every character is experiencing his own personal apocalypse.

Project SOX Finally Gets Explained

And then everything goes completely off the rails.

The engineering students are gathered together for what initially looks like another ridiculous presentation.

Instead, Nojima unveils Project SOX, an absurd surveillance operation designed around one simple objective:

Prevent the boys from having sex.

The idea is already ridiculous enough.

Then Yamamoto reveals what they’ve actually built.

An AI-powered camera system can monitor rooms and supposedly identify suspicious activity. The project has gone through multiple versions, with Yamamoto obsessively trying to improve its accuracy.

The problem?

How do you test whether a machine designed to detect sexual activity actually works?

The answer is so stupid that it loops back around into being brilliant.

You would have to test it.

And Yamamoto obviously can’t do that himself.

So instead of solving the fundamental problem, he basically decides that accuracy doesn’t matter.

Deterrence does.

That is where Project SOX stops being merely stupid and becomes genuinely terrifying.

The Three Horrible Options

The presentation introduces several possible methods of stopping romantic activity.

1. The Laser

The first option involves an automated laser system.

The intention is basically to make people terrified of what will happen if the machine detects something suspicious.

The engineering students immediately hate the idea.

Honestly, I can’t blame them.

2. Psychological Warfare

Option two might somehow be even worse.

The system can project deliberately disturbing imagery into the room to destroy the mood.

And yes, the infamous maid imagery is involved.

The reaction from the students is exactly what you’d expect.

Nobody wants to be psychologically attacked by a projector during a romantic moment.

3. The Poison Dart

Then comes the poison dart system.

At first, the students almost seem relieved.

That’s how bad the first two options are.

Then Yamamoto explains what the poison actually contains.

Tetrodotoxin.

And apparently some of his own sweat.

At this point, the chapter stops pretending that these people have any connection to normal human morality.

Nojima’s “Test” Is Pure Grand Blue

The reveal involving Nojima is where the chapter reaches another level of absurdity.

A diluted test dose was apparently administered to him days earlier.

And he is still visibly suffering from the effects.

The students are horrified.

The reader is horrified.

And Yamamoto seems almost completely unfazed.

The running joke that Nojima is basically treated as “deceased” despite still being around is exactly the kind of dark visual gag that makes Grand Blue Dreaming so difficult to explain to someone who hasn’t read it.

If I tried to describe this chapter to a normal person, they’d probably assume I was making it up.

The Final Boss: Trinity

And then we get the ultimate Project SOX configuration.

Instead of choosing one method, Yamamoto decides to combine them.

Laser + psychological attack + poison dart.

That’s the Trinity system.

At this point, the boys finally decide they’ve had enough.

They revolt.

Mitarai in particular makes it clear that if Yamamoto tries installing one of these machines in his room, there will be consequences.

Except…

The machines are already installed.

That is the real punchline.

While everyone was sitting in the lecture hall listening to Nojima’s presentation, Fujiwara had apparently been installing the devices in their rooms.

Iori and the others weren’t debating whether their privacy would be violated.

Their privacy had already been violated.

The Anti-Tamper System Makes Everything Worse

There’s one detail that makes the situation especially hilarious: trying to remove the machines is also dangerous.

The surveillance devices are programmed to react if someone attempts to destroy, unplug, cover, or otherwise disable them.

So the boys are trapped.

Leave the machine alone, and they have to live under surveillance.

Try to remove it, and the machine fights back.

It’s an absolutely ridiculous version of a security system.

And naturally, Grand Blue treats it like a military coup.

The Peach Garden Oath Was the Perfect Ending

Then Chapter 112 delivers its masterpiece.

The boys are forced into a parody of the legendary Oath of the Peach Garden from Romance of the Three Kingdoms.

Instead of swearing brotherhood and loyalty, these absolute disasters swear to protect their chastity.

Forever.

The visual contrast is incredible.

Yoshioka suddenly gives the scene this huge, serious, almost historical-art feeling. The dramatic clouds, falling petals, ceremonial composition, and solemn expressions make the whole thing look like the climax of an epic war manga.

Except the “war” is against dating.

And the sacred oath is basically:

“We swear to remain virgins.”

The final roster makes the joke even better:

• Iori Kitahara
• Kohei Imamura
• Yuu Mitarai
• Shinichiro Yamamoto
• Nojima — DECEASED

That last entry absolutely killed me.

Nojima is still there, but apparently his condition is so terrible that the manga might as well put his obituary in the credits.

My Predictions for Grand Blue Dreaming Chapter 113

So where does the manga go from here?

I have three theories, and honestly, I think the first one is the most likely.

Theory #1: Iori’s First Night Under Surveillance

I expect Chapter 113 to return to Iori’s home.

Imagine him walking into his bedroom, slowly looking at the ceiling, and realizing that the machine is watching him.

Now imagine Chisa walking in.

That setup alone could carry an entire chapter.

Iori will probably spend the entire night behaving like a malfunctioning robot because he’s terrified of accidentally triggering the system.

A cough?

Danger.

A strange noise?

Danger.

Chisa standing too close?

Immediate panic.

This feels like exactly the kind of escalating misunderstanding that Grand Blue loves.

Theory #2: Chisa Accidentally Activates Everything

This is my favorite possibility.

Chisa has absolutely no idea what Project SOX is.

So what happens if she sees the strange machine on the ceiling?

She’ll probably try to inspect it.

Maybe she’ll reach for it.

Maybe she’ll try to remove it.

And Iori will have approximately 0.2 seconds to stop her.

The resulting scene could be one of the funniest sequences in the entire arc.

I can already imagine Iori throwing himself across the room to stop Chisa from touching a ceiling-mounted death machine while desperately trying to explain absolutely nothing.

Theory #3: Fujiwara Becomes the Target

If the machines can’t be removed directly, the boys need another solution.

That makes Fujiwara the obvious target.

He installed the devices, so he presumably knows something about their controls.

I could see Iori and Mitarai forming the most dysfunctional alliance imaginable and attempting to hunt Fujiwara down.

It would basically become a campus spy thriller starring people who can barely behave normally for five minutes.

What I Think Makes This Arc Work

For me, the biggest strength of this storyline isn’t even the absurd technology.

It’s the escalation.

The chapter starts with Iori worrying about marriage.

Then Yuu worries about a Christmas date.

Then the engineering department reveals a surveillance project.

Then the project includes lasers.

Then psychological warfare.

Then poison.

Then an automated turret.

Then an anti-tamper system.

Then we discover the machines are already installed.

And finally, everyone swears a sacred oath of chastity under falling peach blossoms.

That’s an escalation ladder only Grand Blue could climb.

What I especially love is that the manga doesn’t need to abandon its characters to make the joke work. Iori is still Iori. Yuu is still terrified of being exposed. Kohei is still living in his 2D universe. Yamamoto is still completely insane.

The situation just keeps getting bigger around them.

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Final Thoughts Before Chapter 113

Chapter 112 might be one of the strongest examples yet of why Grand Blue Dreaming remains so difficult to imitate.

The premise sounds stupid when you describe it.

A group of college students creates an anti-sex surveillance system.

That’s the joke.

But the execution turns that premise into a full-scale authoritarian nightmare complete with military hardware, chemical weapons, PowerPoint presentations, secret installations, and a historical oath.

And somehow, it works.

I’m especially curious about Chisa’s reaction. She has been relatively detached from the engineering boys’ latest disaster, and bringing her directly into the Project SOX situation could create exactly the kind of romantic chaos the manga needs right now.

As for Iori?

The poor guy thought his biggest problem was potentially being married.

Now he has to worry about being romantically executed by a ceiling turret.

That’s a pretty normal week in Grand Blue.

Grand Blue Dreaming Chapter 113 is expected on October 6, 2026, and after that ending, I’m absolutely not missing it.

If Chapter 112 was the declaration of the Peach Garden Oath, Chapter 113 has only one job:

Show us what happens when these idiots actually have to live with it.