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

Unexpectedly Naughty Fukami (Manga)

OngoingManga🇯🇵

What happens

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 charmer 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 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 his interest. 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. A short-form anime from Studio Hōkiboshi followed in 2025, then a live-action drama directed by Emiko Shirai in 2026. The manga is 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
Networks
Volumes
4
Magazine
ComicFesta
Publisher
Suiseisha
Aired Start
Release Year
Content Rating
MA

Where to read Unexpectedly Naughty Fukami (Manga)

ComicFestaCoolmicSeven Seas EntertainmentAmazonBookPal

Before You Read

  • 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 office slow-burn romance sparked by a shared overnight business trip.
  • English editions: digital through Coolmic, and an official print edition from Seven Seas Entertainment’s Boys’ Love imprint, with volume 1 dated September 29, 2026.
  • Where to read: ComicFesta and Coolmic digitally, with English print volumes through Seven Seas Entertainment, Amazon, and BookPal.

Reviewed by Renkaze

7.5/10

Unexpectedly Naughty Fukami is the original work behind the franchise: Ayaka Matsumoto's manga, which both screen adaptations draw from.

What It Is

Serialized digitally on ComicFesta since December 2022 and now collected into four volumes by Suiseisha, the manga follows the Kaji-and-Fukami premise that both screen adaptations later used: a self-absorbed sales ace who secretly rates his coworkers, and the plain-looking colleague who upends his worldview after a single business trip. Matsumoto lets the push and pull between Kaji's certainty and Fukami's guardedness build panel by panel, where the anime has six minutes per episode and the drama thirteen.

The art carries the story's after-hours beats, where Fukami's appearance and demeanor shift, and the plain daytime clothes read as a choice rather than an accident. The manga is still adding chapters beyond where either screen version stops.

What Works

  • Room to develop: the ongoing format gives the central relationship more space than the anime or the drama has.
  • Premise: the self-absorbed-salesman-meets-deceptively-striking-colleague setup has been adapted twice, as an anime in 2025 and a live-action drama in 2026.
  • English access: digital availability through Coolmic and a Seven Seas Entertainment print edition.
  • A contained setting: an office, a business trip and a shared floor of colleagues are enough to keep the story moving, so each chapter can hinge on one small reversal of who is reading whom.

Who It Suits

Readers who like a workplace comedy with a guarded lead will find plenty to follow, and the open run suits anyone happy to read alongside the serial. The manga is ongoing, so the story has no ending yet and further volumes are still to come. It also suits anyone who has seen the anime or the drama and wants to see where the source goes past them.

Final Score: 7.5/10

Serialisation began on 7 December 2022 and two screen adaptations followed by 2026.

Ayaka Matsumoto publishes the work digitally on ComicFesta under the Screamo label. Suiseisha collects it in print under the Glanz BL Comics imprint, four volumes so far. Serialisation and collection have run in parallel since 2022.

ComicFesta and Coolmic carry the Japanese digital editions, Seven Seas Entertainment handles English print publication, and Amazon and BookPal sell the print volumes.

The two screen versions arrived a year apart. Studio Hokiboshi made the 2025 anime, and Emiko Shirai directed the 2026 drama, each with its own cast and crew. The manga is still running, so neither adaptation reaches an ending.

FREQUENTLY ASKED QUESTIONS

What mismatch sets the Fukami manga in motion?

Kaji Akihiro is the sales department's ace, admired for his looks and his ease with clients, while privately rating his colleagues on a numerical attractiveness scale. Yu Fukami from IT barely registers on it, until an overnight business trip forces the two to share a room.

How regularly has Suiseisha collected the serial into volumes?

Four volumes so far: 18 January 2024, 18 July 2024, 18 March 2025 and 16 January 2026. Three of the four are dated to the eighteenth of the month, and the gaps have widened from six months between the first two books to ten between the last two.

How much does the Seven Seas English volume cost?

Seven Seas prices volume one at 15.99 US dollars for 160 pages, under ISBN 979-8-89863-267-0. That is the print English edition, and it sits alongside the digital Japanese serial rather than replacing it.

Why did the first collected book take so long to appear?

Chapters began on ComicFesta in December 2022, but volume one did not arrive until January 2024. For roughly thirteen months the work existed only as instalments on a platform, with nothing to put on a shelf and no way to read it except at the pace the service released it.

Was volume three issued in more than one edition?

Yes. Volume three came out in a standard edition and a limited edition, each carrying its own separate ISBN. Collectors need to check which printing they are buying, since the two are separate products rather than one book with a variant cover.

Which screen versions come from this manga?

Two: the 2025 Studio Hokiboshi anime and the 2026 live action drama directed by Emiko Shirai. Both are adaptations of this ongoing serial, which is the original work in the franchise, so the manga is the starting point rather than a tie in.

Who created Unexpectedly Naughty Fukami?

Ayaka Matsumoto both writes and illustrates it, so the words and the art come from one hand. It has been serialised digitally on ComicFesta under the Screamo label since 7 December 2022 and is published in Japan by Suiseisha under the Glanz BL Comics imprint.

Is the manga finished?

No. It is still being serialised on ComicFesta, and four volumes have been collected so far.

Where can this manga be read or bought legally?

ComicFesta and Coolmic carry the digital Japanese and English chapters, and Seven Seas, Amazon and BookPal carry the English print edition. That gives readers both a chapter by chapter route and a collected volume route.

Where a title can be watched, and who is credited on it, may have changed since publication, as our disclaimer explains.

Themes

This is a digital-first comic, and the sequence of its publication says something about how that works. Chapters began appearing in December 2022. The first collected volume did not arrive until January 2024. For roughly thirteen months the work existed only as instalments on a platform, with no object to put on a shelf and no way to read it except in the order and at the pace the service released it.

That shapes the storytelling. A serial built for a digital platform has to give each instalment a reason to have been opened, which suits a premise founded on a rating system. Kaji's private scale is a device that can be reapplied in any chapter, and the running business of a man quietly revising his own numbers gives short units something to close on.

The collected volumes do the opposite job. Four of them now gather a story that has never stopped adding to itself, so each book is a cross-section of an argument still in progress rather than a chapter of a finished one.

Interesting facts

  • Seven Seas sets volume one of its print edition at 160 pages for 15.99 US dollars, under the ISBN 979-8-89863-267-0.

How it was made

Suiseisha has collected the serial steadily: volume one on 18 January 2024, volume two on 18 July 2024, volume three on 18 March 2025 and volume four on 16 January 2026, with three of the four dated to the eighteenth of the month. Volume three was issued in two forms, a standard edition and a limited edition carrying its own separate ISBN. The intervals between books have widened across the run, from six months between the first two to ten between the last two.

Images only: posters and portraits from TMDB, artist images from Spotify and book cover art from AniList. No factual content is taken from these services. This product uses the TMDB API but is not endorsed or certified by TMDB. Factual data such as dates, credits and names is compiled from the sources recorded for each entry. All reviews, biographies and editorial commentary are written by BL & GL Flix. This product uses the TMDB API but is not endorsed or certified by TMDB. All posters, portraits, cover art, and promotional materials remain the property of their respective copyright holders and are shown solely to identify the works described. BLGLFLIX does not host or distribute any video content. See our DMCA / Copyright Policy.