Unexpectedly Naughty Fukami manga cover - Japanese BL by Ayaka Matsumoto, published by Suiseisha

Unexpectedly Naughty Fukami (Manga)

OngoingManga🇯🇵

SYNOPSIS

Unexpectedly Naughty Fukami (Japanese: やたらヤラしい深見くん, Hepburn: Yatara Yarashii Fukami-kun) is an ongoing Japanese BL workplace romantic comedy built on a very simple mismatch. Kaji Akihiro is the sales department's ace, admired across the office for his looks, his charm and the ease with which he handles clients. Privately he is a self-absorbed playboy who silently rates his coworkers on a numerical attractiveness scale, and almost nobody clears the bar. Yu Fukami, the outwardly plain, frumpily dressed colleague from the IT department, barely registers on that scale at all, until an overnight business trip forces the two of them to share a room and an unexpected encounter shows Kaji that the drab exterior has been doing a great deal of work.

What follows is less a seduction than a standoff. Kaji Akihiro is a man convinced he already knows exactly what he wants and how quickly he can have it, and the discovery that Yu Fukami is far more striking than his daytime appearance suggests only sharpens the appetite. Yu Fukami, for his part, is guarded in a way that has little to do with shyness; he keeps his distance deliberately, and the unremarkable clothes turn out to be a decision rather than an accident. Back in the office the two must go on working together as though nothing has changed, with colleagues, client dinners and department politics pressing in around a slow burn neither man will name out loud. The comedy comes from Kaji's certainty. The weight comes from how long it takes him to notice that certainty is not the same as understanding.

Ayaka Matsumoto writes and illustrates the series, which has been serialized digitally on ComicFesta under the Screamo label since December 7, 2022 and collected by Suiseisha into bound volumes, four as of early 2026. Its mix of office farce and real emotional vulnerability carried it well beyond its original serialization: a short-form anime from Studio Hōkiboshi followed in 2025, then a live-action drama directed by Emiko Shirai in 2026, an unusually fast adaptation pace for an ongoing digital BL title. Mature themes are part of the register, but the story's centre of gravity stays on the workplace and the negotiation between the two men. English readers can find it digitally through Coolmic, with Seven Seas Entertainment issuing an official print edition under its Boys' Love imprint from September 29, 2026. The manga remains the fullest version of the story, still adding chapters past where either screen adaptation stops.

CONTENT DETAILS

Native Title
やたらやらしい深見くん
Original Title
Unexpectedly Naughty Fukami
Also Known As
やたらやらしい深見くん, Yatara Yarashii Fukami-kun, Yatara Yarashi Fukami-kun, Yatarayarashii Fukamikun, Unexpectedly Naughty Fukami, Unexpectedly Naughty Fukami (Manga), Naughty Fukami, Fukami-kun, Fukami-kun Manga, UNF Manga, Yatara Yarashii Fukami-kun (Manga)
Adaptation
Unexpectedly Naughty Fukami is the original work in this franchise. It is written and illustrated by Ayaka Matsumoto and has been serialized digitally on ComicFesta under the Screamo label since December 7, 2022. Both the 2025 Studio Hōkiboshi anime and the 2026 live-action drama directed by Emiko Shirai are screen adaptations of this ongoing manga.
Themes
Key Themes
Workplace RomanceOffice BLSlow BurnEnemies To LoversHidden PersonalityBusiness TripSalaryman RomanceSource MangaJapanese BLFranchise OriginDigital SerializationOngoing SeriesScreen Adaptations
Country
Language
Japanese
Original Author
Ayaka Matsumoto
Illustrator
Ayaka Matsumoto
Volumes
4
Magazine
ComicFesta
Publisher
Suiseisha
Aired Start
Release Year
Content Rating
MA

READ ON

ComicFestaCoolmicSeven Seas EntertainmentAmazonBookPal

KEY TAKEAWAYS

  • Unexpectedly Naughty Fukami is the original BL manga written and illustrated by Ayaka Matsumoto, serialized on ComicFesta under the Screamo label since December 7, 2022.
  • Collected into four volumes by Suiseisha as of early 2026, and still ongoing with new chapters continuing to release.
  • The source material for the entire franchise, adapted into both a 2025 anime by Studio Hōkiboshi and a 2026 live-action drama directed by Emiko Shirai.
  • Follows sales ace Kaji Akihiro and IT colleague Yu Fukami in an intense office slow-burn romance sparked by a shared overnight business trip.
  • Published in English digitally by Coolmic, with Seven Seas Entertainment publishing an official English print edition.
  • Volume 1 of the English print release is scheduled for September 29, 2026 from Seven Seas Entertainment’s Boys’ Love imprint.
  • Unusually fast adaptation pace: the manga inspired both an anime and a live-action drama within three years of its original serialization.
  • Available to read on ComicFesta and Coolmic, with English print volumes available through Seven Seas Entertainment, Amazon, and BookPal.
  • Most complete version of the story: as an ongoing series, the manga continues past where either screen adaptation currently leaves off.
  • Published under the highest age rating, per ComicFesta’s own content classification for the series.

EDITOR’S VERDICT

7.5/10

Reading Unexpectedly Naughty Fukami from the beginning, it is easy to see why Ayaka Matsumoto's manga became the franchise's foundation rather than a one-off hit. This is the version of the story with the most room to breathe, and it uses that room well.

What It Is

Serialized digitally on ComicFesta since December 2022 and now collected into four volumes by Suiseisha, the manga follows the same Kaji-and-Fukami premise that both screen adaptations later borrowed: a self-absorbed sales ace who secretly rates his coworkers, and the plain-looking colleague who upends his worldview after a single business trip. What sets the manga apart is pacing. Matsumoto lets the push-and-pull between Kaji's narcissism and Fukami's guardedness build panel by panel, rather than compressing it into a six-minute anime episode or a thirteen-minute broadcast slot.

The art carries a lot of the emotional weight here, particularly in the transformation beats where Fukami's appearance and demeanor shift after hours. It is a device that works better on the page than it strictly needs to on screen, and it is the reason the manga still reads as the most complete version of this romance even with two adaptations now competing for attention.

What Works

  • Unhurried pacing: the ongoing format lets the central relationship develop with more nuance than either the anime or the drama has room for.
  • Franchise-defining hook: the narcissist-meets-deceptively-striking-colleague premise clearly had enough pull to justify two separate screen adaptations within three years.
  • Growing English access: digital availability through Coolmic and an incoming Seven Seas Entertainment print edition make it easier than ever for English-language readers to catch up.

Where It Could Stretch

As an ongoing series, the manga does not offer a tidy ending yet, and readers who prefer complete stories may want to wait for further volumes. The pacing that rewards patience can also feel slow compared to the punchier screen adaptations for readers coming in from the anime or drama first.

Final Score: 7.5/10

FREQUENTLY ASKED QUESTIONS

What is Unexpectedly Naughty Fukami (manga)?

Unexpectedly Naughty Fukami is the original ongoing Japanese BL manga written and illustrated by Ayaka Matsumoto, serialized digitally on ComicFesta under the Screamo label since December 7, 2022 and collected into bound volumes by Suiseisha.

How many volumes does the Unexpectedly Naughty Fukami manga have?

As of early 2026, the manga has four bound volumes published by Suiseisha, with new chapters continuing to release digitally on ComicFesta.

Is the Unexpectedly Naughty Fukami manga finished?

No, the manga is still ongoing. Unlike the completed 2025 anime and 2026 live-action drama, the source manga continues publishing new chapters beyond where either adaptation currently leaves off.

Is the Unexpectedly Naughty Fukami manga available in English?

Yes, it is available in English digitally via Coolmic, and Seven Seas Entertainment is publishing an official English print edition under its Boys' Love imprint, with Volume 1 scheduled for September 29, 2026.

What is the Unexpectedly Naughty Fukami manga about?

It follows sales ace Kaji Akihiro and quiet IT colleague Yu Fukami in an intense office slow-burn romance, sparked when an overnight business trip reveals a side of Fukami that Kaji never expected.

Who wrote and illustrated Unexpectedly Naughty Fukami?

The manga is written and illustrated by Ayaka Matsumoto, who also receives an original story credit on both the 2025 anime and the 2026 live-action drama adaptations.

Where can I read the Unexpectedly Naughty Fukami manga legally?

The manga can be read on ComicFesta, its original Japanese serialization platform, and digitally in English via Coolmic. English print volumes are available through Seven Seas Entertainment, Amazon, and BookPal.

Did the Unexpectedly Naughty Fukami manga get adapted into anime?

Yes, the manga was adapted into a 2025 short-form anime produced by Studio Hōkiboshi for AnimeFesta, directed by Akane Ozora, roughly six minutes per episode across eight episodes.

Did the Unexpectedly Naughty Fukami manga get adapted into a live-action drama?

Yes, a 2026 live-action drama directed by Emiko Shirai adapted the manga into a ten-episode series starring Atsuki Kashio and Yū Miyazaki, airing on Tokyo MX.

How does the manga differ from the anime and the live-action drama?

The manga is the original, ongoing source with room for the slowest, most detailed pacing. The 2025 anime compresses the story into six-minute episodes, while the 2026 live-action drama runs about 13 minutes per episode with a real-life cast. Both adaptations are based on, but do not exceed, the manga's current chapters.

When did the Unexpectedly Naughty Fukami manga start?

The manga began serialization on ComicFesta under the Screamo label on December 7, 2022.

What publisher releases Unexpectedly Naughty Fukami in Japan?

The manga is collected into print volumes by Suiseisha, and serialized digitally on ComicFesta, a platform operated by WWWave Corporation.

Who is publishing the English print edition of Unexpectedly Naughty Fukami?

Seven Seas Entertainment announced its license for the manga on November 5, 2025, with Volume 1 releasing in English print on September 29, 2026.

Is Unexpectedly Naughty Fukami a BL manga?

Yes. It is officially a BL (Boys' Love) manga, with the central romance between Kaji Akihiro and Yu Fukami as its narrative core alongside workplace comedy.

How many chapters does the Unexpectedly Naughty Fukami manga have?

The manga is an ongoing series with new chapters released digitally on ComicFesta; an exact chapter count is not published by the platform, though four volumes have been collected as of early 2026.

Is there a Volume 5 of the Unexpectedly Naughty Fukami manga?

As of this writing, four volumes have been collected by Suiseisha. Since the manga is ongoing, additional volumes are expected as new chapters accumulate on ComicFesta.

What genre is Unexpectedly Naughty Fukami?

It is a Japanese BL workplace romantic comedy, blending office humor with a slow-burn enemies-to-lovers dynamic between its two male leads.

Is Unexpectedly Naughty Fukami worth reading?

For readers who want the most complete, unhurried version of Kaji and Fukami's story, including character beats that neither screen adaptation had room for, the manga is the definitive way to experience this franchise.

What language is the Unexpectedly Naughty Fukami manga in?

The manga is written in Japanese, with the native title やたらやらしい深見くん (Yatara Yarashii Fukami-kun). English digital and print editions are available through licensed publishers.

What is the reading order for the Unexpectedly Naughty Fukami franchise?

There is no strict required order, since the manga is the ongoing original source, and the 2025 anime and 2026 live-action drama are separate adaptations of it. New readers can start with any format, though the manga currently contains the most story content.

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