Mysterious Girlfriend X Manga Volumes: Full Guide (2026)

There are 12 Japanese volumes and 6 English omnibus volumes of Mysterious Girlfriend X manga — and the series is fully complete. No cliffhangers, no cancellations, no waiting. You can read the whole thing from start to finish right now.

If you’re here because you saw the anime, heard about the drool thing, or just spotted it on a shelf and thought “what is this?”, you’re in the right place. And if that drool premise has you hesitant — stay with it. What sounds absurd on paper becomes a surprisingly tender metaphor for emotional intimacy, vulnerability, and the strange chemistry between two people figuring each other out. By the end of the first volume, the weirdness starts to feel like it belongs.

Here’s everything you need to know about the Mysterious Girlfriend X manga volumes, editions, and how to get through the story.

How Many Mysterious Girlfriend X Manga Volumes Are There?

The short answer: 12 Japanese volumes and 6 English omnibus volumes. The series is finished — the story is complete and fully available.

Mysterious Girlfriend X (謎の彼女X) was created by Riichi Ueshiba and published chapter-by-chapter — a process called serialization — in Afternoon, a manga magazine from Kodansha, one of Japan’s largest manga publishers. The story spans 92 chapters across those 12 volumes, with the first Japanese volume arriving in August 2006 and the final volume releasing in November 2014.

The English edition, published by Vertical (an imprint of Kodansha USA Publishing), compiles the series into 6 omnibus volumes. An omnibus is a collected edition that bundles multiple volumes into one book — in this case, each English omnibus contains two Japanese volumes’ worth of content. That means you only need six books to own the entire story. Because the English edition bundles two Japanese volumes together, the numbering is different: Japanese volume 1 and 2 become English omnibus volume 1, Japanese volumes 3 and 4 become omnibus volume 2, and so on. The English edition is rated 16+, which feels right given the series’ mix of romance, mildly suggestive content, and occasionally surreal imagery.

Genre-wise, this falls squarely into romance and school life territory, though it does things with both genres that you won’t find anywhere else. The central premise — a boy named Tsubaki becomes mysteriously bonded to his enigmatic classmate Urabe through her drool — is genuinely strange. In practice, though, Ueshiba uses it as a storytelling device rather than just a gimmick. The drool becomes a way for Tsubaki and Urabe to communicate emotions they can’t put into words, and after a few chapters, it starts to feel surprisingly natural within the story’s logic. Give it until the end of volume 1 before you decide.

What Happens in Each Volume

A quick, spoiler-free walkthrough of the story’s progression. The series flows in an episodic style — meaning each chapter tends to focus on a single idea or moment rather than building long multi-chapter storylines — but you can feel natural shifts in focus as the story moves forward.

Volumes 1–3: The Bond Forms

This is where the premise gets established. Tsubaki tastes Urabe’s drool (yes, really), and something clicks — literally. He becomes addicted to it, and Urabe, who is quiet, strange, and carries scissors in a holster strapped to her thigh (it’s a recurring character detail that becomes important), agrees to a daily exchange. What sounds like pure shock value quickly settles into something more interesting: two socially mismatched teenagers stumbling into a relationship built on a connection neither of them fully understands.

The school life setting fills in around them. Tsubaki’s friends, Urabe’s isolation, and the daily rhythms of high school give the story grounding. These early volumes are about discovery — Tsubaki learning who Urabe is beneath her reserved, hard-to-read exterior, and Urabe slowly deciding how much of herself to reveal.

Volumes 4–6: Deepening and Rivals

The relationship matures, and the story introduces new characters who compete for romantic attention — a common pattern in romance manga — testing the bond between Tsubaki and Urabe. Jealousy, misunderstanding, and the anxiety of caring about someone all get explored here. The emotional stakes climb steadily. Ueshiba’s writing is patient — he lets small moments carry real weight, and the drool exchange becomes a surprisingly effective emotional barometer. When it changes, something in the relationship has shifted.

Volumes 7–9: Pressure and Doubt

The couple faces more complex emotional territory. Outside pressures — from friends, from circumstances, from their own insecurities — push Tsubaki and Urabe into uncomfortable places. These volumes feel heavier. The relationship isn’t in danger of ending so much as it’s being asked to grow up, and both characters struggle with what that means. The tone stays fundamentally hopeful — this is still a love story at its core — but the growing pains are real and honestly drawn.

Volumes 10–12: The Conclusion

The final stretch brings the story to a definitive ending. Tsubaki and Urabe’s relationship arrives at a clear resolution, and Ueshiba doesn’t leave threads hanging. For a series built on mystery and ambiguity, the conclusion feels earned — it answers the questions that matter while leaving the right things unsaid.

Twelve volumes was exactly the space this story needed, and the ending doesn’t feel rushed or cut short. It’s complete in every sense.

A Marathon Reading Plan for Mysterious Girlfriend X

At 92 chapters across 12 Japanese volumes (or 6 English omnibus books), this is a very manageable binge. You could realistically finish it in a long weekend if you’re motivated, or spread it comfortably across a week of evening reading sessions.

Here’s a natural way to break it up. If you own the English omnibus editions, the session breaks line up cleanly with the books you’re holding:

Session 1 — Omnibus Volumes 1–2 (Japanese Volumes 1–4): Read through the setup and early relationship. By the end of omnibus 2, the initial premise is fully established, early conflicts have been introduced and resolved, and you’ll have a strong sense of whether the series is for you. This is a solid stopping point if you need to take a break.

Session 2 — Omnibus Volumes 3–4 (Japanese Volumes 5–8): The middle stretch deepens everything. Rival characters, emotional complications, and some of the series’ best individual chapters live here. Stop after omnibus 4 — the major emotional developments settle enough to give you a breather before the final act.

Session 3 — Omnibus Volumes 5–6 (Japanese Volumes 9–12): Read straight through to the ending. The last four Japanese volumes build momentum that rewards continuous reading, and the conclusion hits harder if you aren’t stopping and starting.

That said, the chapter-by-chapter structure — where each chapter focuses on a single idea or moment — makes Mysterious Girlfriend X equally friendly for short reading sessions. You can read one or two chapters at a time and still feel satisfied. There’s no pressure to marathon it — the story works at whatever pace fits your schedule.

Mysterious Girlfriend X — Manga vs. the 2012 Anime

A TV anime adaptation aired in 2012, and if that’s how you found this series, you’re not alone. The anime brought a lot of new readers to the manga.

Here’s what you should know: the anime covers only a portion of the manga’s full story. The manga ran until 2014 and spans 92 chapters across 12 volumes, so there’s significantly more material in the manga than the anime had time to adapt. If you watched the anime and liked it, the manga has a lot left to offer — including, crucially, the actual ending.

The manga’s complete run provides a definitive conclusion to Tsubaki and Urabe’s relationship. The anime doesn’t reach that point. If you want the full story with its proper resolution, the manga is the only way to get it.

Should you start from volume 1 even if you watched the anime? Yes. The manga has details, scenes, and character moments that the adaptation trimmed or restructured. Starting from the beginning gives you the complete experience, and the early volumes read quickly enough that it won’t feel like a chore even if some beats are familiar.

Which Edition Should You Buy?

For English readers, there’s really one choice, and it’s a good one.

English Omnibus Edition (Vertical)

The English release compiles the series into 6 omnibus volumes, each containing two Japanese volumes’ worth of content. This is published by Vertical (an imprint of Kodansha USA Publishing) and available in both print and digital formats. The final omnibus volume (vol. 6) released on June 13, 2017, meaning the complete English edition has been available for years.

The omnibus format is convenient — fewer books on your shelf, and each volume gives you a satisfying chunk of story. Since each English book covers two Japanese volumes, you’re getting roughly 15–16 chapters per omnibus, which is a solid reading session.

For anyone looking to grab the final volume and see how it all wraps up, the last omnibus — covering Japanese volumes 11 and 12 — brings Tsubaki and Urabe’s story to its conclusion.

Japanese Edition

The original Japanese release consists of 12 individual volumes published by Kodansha under their Afternoon KC label — a manga publishing line associated with Afternoon magazine — and is also available digitally. If you read Japanese or are studying the language, the individual volumes offer the original formatting and are worth seeking out.

Which One Should You Pick?

For English readers, the Vertical omnibus edition is the only official English option — and it covers the complete series. You don’t need to hunt down multiple editions or worry about whether the translation is finished. All 92 chapters, all 12 volumes’ worth of story, collected in 6 books. That’s it. Clean and simple.

Both print and digital copies are available through major retailers, so pick whichever format you prefer.

Frequently Asked Questions

How many volumes of Mysterious Girlfriend X are there?

There are 12 Japanese volumes and 6 English omnibus volumes (2-in-1 format). Both editions cover the complete series — all 92 chapters.

Is Mysterious Girlfriend X finished?

Yes. The manga serialization ended in 2014, and the story has a definitive conclusion. No loose ends, no unresolved storylines — it’s done.

Who publishes Mysterious Girlfriend X in English?

Vertical (an imprint of Kodansha USA Publishing) handles the English release, available in both print and digital formats.

Is there an anime adaptation?

Yes. A TV anime aired in 2012. It covers a portion of the manga but doesn’t reach the story’s ending — the manga is the only way to experience the complete narrative.

What age rating does the English edition have?

The English omnibus is rated 16+ by Kodansha USA. The series contains mildly suggestive content, some suggestive imagery, and mature thematic elements, but nothing extreme. The rating feels appropriate for older teens and adults.

Is the drool thing as weird as it sounds?

It’s weird at first — there’s no getting around that. But Ueshiba uses it as a storytelling device rather than just a gimmick. The drool becomes a way for Tsubaki and Urabe to communicate emotions they can’t put into words, and after a few chapters, it starts to feel surprisingly natural within the story’s logic. Give it until the end of volume 1 before you decide.