Marriage Toxin: What Chapter to Read After Season 1? (Full Manga Guide)

If you’ve just wrapped up Season 1 of Marriage Toxin, you’re probably feeling the same mix of hype and frustration I did. Hype—because the anime absolutely nailed that chaotic blend of assassin action and awkward romance. Frustration—because now you want more, and there’s no Season 2 (yet).

The good news? The manga is way ahead, and trust me—it only gets better from here.

Let’s break it down in a simple, fan-to-fan way: where to start, what to expect, and whether it’s worth diving into the manga right now.

Where the Anime Ends (And Where You Should Begin)

Season 1 of Marriage Toxin adapts roughly Chapters 1–21 of the manga. It covers the early foundation of the story:

• Gero’s introduction as a socially awkward poison master
• His partnership with the chaotic and unpredictable Mei Kinosaki
• The early “marriage candidate” arcs

Covered arcs:

• Introduction Arc – Setting up Gero’s mission to find a wife
• Water Master Arc – Featuring Shizuku Ushio
• Sound Master Arc – Ending with Shiori Ureshino’s storyline

The anime wraps things up right after the Sound Master conflict. It’s a solid stopping point, but also very much a “this is just the beginning” moment.

Start reading from Chapter 22

Marriage Toxin Ending Explained: Will Gero Finally Find True Love in the Final Chapter?

Why Chapter 22 Is the Perfect Starting Point

You could go back and read from Chapter 1—and honestly, hardcore fans might enjoy that—but if you want to continue the story directly:

• Chapter 22 (“Sunset”) acts as a transition
• It bridges the emotional aftermath of the previous arc
• It subtly develops Gero and Kinosaki’s dynamic in ways the anime lightly rushes

What I personally love here is how the manga slows things down just enough to let characters breathe. Gero, especially, starts showing more nuance—not just as a deadly assassin, but as someone genuinely trying (and failing) to understand human relationships.

What Comes Next: The Beast Master Arc

Once you move past Chapter 22, you enter what many fans consider the first “this series is special” arc.

Beast Master Arc

This arc introduces some wild new elements:

• Arashiyama – also known as the “Hamster Master”
• Piichi – a dangerous and memorable hitman hunter

At first glance, it sounds ridiculous—and it is—but that’s part of Marriage Toxin’s charm. The series leans into absurdity while still delivering genuinely intense fights and character moments.

Why this arc stands out:

• More creative “Master” abilities
• Higher stakes and smarter combat
• Stronger emotional beats
• Expands the world beyond just “find a wife”

Quick Manga Progression Table

Is the Manga Worth It?

Short answer: 100% yes.

Long answer? The manga actually enhances everything the anime does well—and then adds more depth.

Here’s what you’ll notice immediately:

• Better Character Depth – More inner thoughts from Gero and more layered interactions with Kinosaki
• Insane Art Style – Detailed fights and unique visual storytelling
• More Creative “Masters” – Powers get weirder, fights get smarter, and the world expands

How Far Ahead Is the Manga?

As of early 2026, the manga has 150+ chapters and is still ongoing. There’s already enough content for multiple future anime seasons.

If you’re someone who hates waiting, this is the perfect time to jump in.

Where to Read the Manga

• Manga Plus (Shueisha) – Free latest chapters
• VIZ Media – Full volumes in digital and print

My Personal Take as a Fan

I went into Marriage Toxin expecting a fun, slightly chaotic action-romcom. What I got instead was something surprisingly addictive.

What makes it work isn’t just the fights or the strange powers—it’s the characters.

Gero is not your typical protagonist. He’s awkward, emotionally clueless, and completely out of his depth when it comes to relationships. Watching him try—and often fail—is weirdly relatable.

Kinosaki is easily one of the most intriguing characters in the series. There’s clearly more going on with her than what we see early on, and the manga slowly teases that mystery in a very satisfying way.

Final Takeaways

• Start at Chapter 22
• Expect stronger arcs and deeper storytelling
• The story keeps improving the further you read

You’re stepping into the point where Marriage Toxin truly starts to shine.