Futago Matomete Kanojo ni Shinai? Manga Volume 5 Releases September 28 With Bonus SS and Jitsuimo Crossover

The manga adaptation of Futago Matomete “Kanojo” ni Shinai? will continue Sakito's unusual three-way relationship with Chikage and Hikari when Volume 5 launches on September 28, 2026. KADOKAWA lists the new book as a 172-page B6 release priced at ¥902 including tax, with print and digital editions arriving on the same day.

The volume also carries several notable extras. The official @jitsuimo account says it includes a new short story written by Muku Shirai, an appearance by characters from Jitsu wa Imouto Deshita., and multiple retailer bonuses. The bonus SS is particularly unusual because it is described as touching slightly on developments beyond light novel Volume 7, which concluded the original story in July 2026.

> Light spoiler notice: this article discusses Volume 5's official premise, Sakito's relationship with Chikage and Hikari, the newspaper club storyline, and the existence of the crossover and bonus SS, but does not reveal the resolution of its scenes or the full short-story contents.

Quick Summary

• Manga title: Futago Matomete “Kanojo” ni Shinai?
• Japanese title: 双子まとめて『カノジョ』にしない？
• Latest volume: Volume 5
• Release date: September 28, 2026
• Publisher: KADOKAWA
• Label: Alive+ / MF Comics Alive+
• Format: B6
• Page count: 172
• Price: ¥902 including tax
• Pre-tax price: ¥820
• ISBN: 9784049722635
• Release formats: print and digital
• Digital release date: September 28, 2026
• Manga: Ameiro Miso / 飴色みそ
• Original work: Muku Shirai / 白井ムク
• Original character design: Minori Chigusa / 千種みのり
• Serialization: Alive+ / KadoComi
• Latest serialized chapter at verification: Chapter 23 Part 1
• Chapter 23 Part 1 date: September 10, 2026
• Next KadoComi update: September 24, 2026
• Protagonist: Sakito
• Heroine: Chikage
• Heroine: Hikari
• Central relationship: Sakito is simultaneously dating both twin sisters
• Volume 5 focus: school activities and their three-way relationship
• Main conflict: involvement with the newspaper club
• Story element: Chikage and Hikari visit Sakito's home together for reporting
• Important development: Tachibana-sensei warns Sakito about Hikari
• Official promotion: highlights increasingly frequent kissing moments with the twins
• Crossover: characters from Jitsu wa Imouto Deshita. are teased to appear
• Additional bonus: a newly written short story by Muku Shirai
• Bonus SS context: it touches slightly on developments beyond original light novel Volume 7
• Original light novel: completed
• Final light novel: Volume 7
• Novel Volume 7 release: July 17, 2026
• Novel Volume 7 length: 342 pages
• Novel Volume 7 price: ¥968 including tax
• Novel Volume 7 ISBN: 9784040763750
• KADOKAWA series figure: 250,000 cumulative copies
• Gamers regular edition: ¥902
• Gamers bonus: four-page booklet containing newly drawn manga
• Gamers limited edition: ¥2,552
• Limited bonus: newly drawn dress-up acrylic stand
• Official post identifies the acrylic stand: as featuring Hikari
• Melonbooks: newly drawn illustration card according to the official post
• Animate: listed as a reservation retailer
• Toranoana: listed as a reservation retailer
• Amazon Japan: reservation available
• Current status: preorders / reservations open

Volume 5 Cover and Visual

Volume 5 Brings the Newspaper Club Deeper Into Their Relationship

KADOKAWA's official synopsis places the newspaper club at the center of one of Volume 5's major storylines.

Sakito's relationship with Chikage and Hikari is supposed to remain a secret, but their closeness at school is becoming increasingly difficult to hide. The situation develops when Sakito begins assisting the newspaper club and eventually earns enough trust to support the twins through its activities.

One reporting assignment then brings Chikage and Hikari to Sakito's home at the same time. The visit itself concludes, but another question emerges when Tachibana-sensei specifically cautions Sakito about Hikari.

KADOKAWA also teases further encounters in an alley and at the characters' familiar café, indicating that Volume 5 continues beyond a single school-club incident.

Notably, this material closely corresponds to the story presented in light novel Volume 2. The manga is therefore still adapting a relatively early stage of the novels even though the source series itself has already concluded with Volume 7.

Chikage, Hikari and Sakito Are Finding It Harder to Hide Their Closeness

The series begins with Sakito misunderstanding a classmate named Usami.

He encounters a serious, academically accomplished girl at school and a much freer girl who spends time at an arcade after class. Sakito eventually discovers that these are not two sides of the same person, but twin sisters Chikage and Hikari.

Overlapping confessions create the series' unusual arrangement: Sakito begins dating both of them.

In manga Volume 5, that secret relationship increasingly collides with ordinary school life. The official promotional post specifically references the commotion involving the newspaper club and repeated “chu,” or kissing, moments with the twins.

As people around them begin to notice their unusual closeness, the challenge becomes more than simply managing a three-person romance. They also have to maintain a balance once the wider school community starts entering the picture.

Jitsuimo Characters Appear While the Bonus SS Jumps Beyond the Manga Timeline

One of Volume 5's more surprising promotional points is an appearance by characters from Jitsu wa Imouto Deshita., commonly shortened to Jitsuimo.

Both series come from Muku Shirai and Minori Chigusa, making the crossover a natural connection between their works.

The official post does not present this as a separate crossover series or side project. The Jitsuimo characters appear as part of Volume 5 itself, giving longtime readers of Shirai's work an additional connection beyond Sakito and the twins' primary storyline.

Even more unusual is the inclusion of a new short story written directly by Muku Shirai.

According to the official promotional text, the bonus SS steps slightly into developments beyond original light novel Volume 7. That places the extra material far ahead of the manga adaptation's current main timeline.

Because Volume 7 is already the light novel's final volume, the SS may give readers a small look at circumstances after the novel's conclusion without forcing the manga adaptation itself to skip forward.

The Original Light Novel Concluded With Volume 7

The original Futago Matomete “Kanojo” ni Shinai? light novel is written by Muku Shirai with illustrations by Minori Chigusa and published under Fantasia Bunko.

KADOKAWA released Volume 7 on July 17, 2026 and explicitly presented it as the conclusion of the heartful triangle romantic comedy.

The final volume sends Sakito, Chikage and Hikari into a conflict over two available study-abroad slots. With only two places for three people, the relationship built around the idea of keeping everyone together finally faces a choice that cannot simply be ignored.

Around the final volume's release, KADOKAWA described Futago Matomete “Kanojo” ni Shinai? as having reached 250,000 cumulative copies.

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Iron Stars

Ameiro Miso's manga adaptation remains on a different timeline. KadoComi published Chapter 23 Part 1 on September 10, 2026, with the next update scheduled for September 24—only four days before Volume 5 reaches stores.

Gamers Offers an Acrylic Stand and Four-Page Manga Bonus

Reservations for Volume 5 are already open through multiple Japanese retailers, with Gamers offering two versions.

The regular edition is priced at ¥902, matching KADOKAWA's official list price. Buyers receive a four-page booklet containing newly drawn manga while bonus stock remains available.

Gamers also offers a ¥2,552 limited edition, consisting of the ¥902 comic and a ¥1,650 dress-up acrylic stand.

The Gamers listing describes it as a newly drawn dress-up acrylic stand, while the official series post shown in the original screenshot identifies the featured character as Hikari.

The limited edition also retains the same four-page Gamers booklet included with the regular edition.

The official promotional post additionally lists Melonbooks with a newly drawn illustration card, while Animate, Toranoana and Amazon Japan are provided as other reservation options. Because specific bonuses for Animate and Toranoana were not detailed in the verified material, this article does not assume additional benefits for those stores.

Why This Matters

1) The manga is still catching up to the novels, but its bonus SS jumps beyond the ending

Volume 5's main story remains tied to relatively early light-novel material, while its bonus short story is said to touch on events beyond the final Volume 7.

2) The Jitsuimo crossover connects two Muku Shirai works

The appearance of Jitsu wa Imouto Deshita. characters creates a cross-series connection for readers of Shirai and Chigusa without being required to understand Sakito's primary story.

3) The secret relationship is increasingly colliding with school life

The newspaper club, home visit and attention from other characters make Sakito's relationship with Chikage and Hikari harder to contain as something known only to the three of them.

4) The retailer bonuses are substantial

Beyond the four-page manga booklet, Gamers has a limited acrylic stand edition while Melonbooks is offering a separate illustration card.

Manga and Light Novel Information

For now, the additional important information currently known includes:

• the Japanese series title is 双子まとめて『カノジョ』にしない？
• the romanization used in this article is Futago Matomete “Kanojo” ni Shinai?
• the manga is drawn by 飴色みそ / Ameiro Miso
• the original work is by 白井ムク / Muku Shirai
• original character design is by 千種みのり / Minori Chigusa
• the manga is published by KADOKAWA
• its label is Alive+
• Gamers categorizes it under the MF Comics Alive+ Series
• Volume 5 launches September 28, 2026
• print and digital editions arrive on the same date
• the physical format is B6
• Volume 5 contains 172 pages
• the official price is ¥902 including tax
• the pre-tax price is ¥820
• ISBN is 9784049722635
• the official synopsis places Sakito in activities involving the newspaper club
• Chikage and Hikari visit Sakito's home together for reporting
• Tachibana-sensei later cautions Sakito regarding Hikari
• the official promotion also references increasingly frequent kissing moments with the twins
• Jitsu wa Imouto Deshita. characters will appear according to the official series post
• the volume includes a newly written SS by Muku Shirai
• the official post says the SS touches slightly on developments beyond original Volume 7
• the original light novel has concluded
• its final installment is Volume 7
• light novel Volume 7 launched July 17, 2026
• Volume 7 contains 342 pages
• Volume 7 is priced at ¥968 including tax
• Volume 7 ISBN is 9784040763750
• KADOKAWA describes Volume 7 as the conclusion of the heartful triangle romantic comedy
• KADOKAWA says the series has reached 250,000 cumulative copies
• KadoComi published Chapter 23 Part 1 on September 10, 2026
• the next update is scheduled for September 24, 2026
• manga Volume 4 previously launched February 28, 2026
• the Gamers regular edition costs ¥902
• the Gamers bonus is a newly drawn four-page manga booklet
• the Gamers limited edition costs ¥2,552
• that price combines the ¥902 comic and ¥1,650 acrylic stand
• the limited edition also receives the Gamers booklet while supplies last
• the official post identifies the limited-edition acrylic stand as featuring Hikari
• Melonbooks is listed with a newly drawn illustration card
• Animate is listed as one of the reservation retailers
• Toranoana is also listed as a reservation retailer
• Amazon Japan has a Volume 5 listing
• the exact X status URL from the supplied screenshot could not be independently verified, so no fabricated X embed is used
• official product information is available through KADOKAWA Manga Volume 5
• the official serialization is available through KadoComi
• the regular edition and bonus are available through Gamers Volume 5
• the limited edition is available through Gamers Limited Edition
• final novel information is available through KADOKAWA Light Novel Volume 7
• the original series overview is available through the Fantasia Bunko Special Website
• series updates are published through Official X
• Volume 5 can be reserved through Amazon Japan

Closing

Futago Matomete “Kanojo” ni Shinai? manga Volume 5 arrives September 28 with the newspaper-club storyline, further developments in Sakito's relationship with Chikage and Hikari, a Jitsuimo crossover, and a new bonus short story from Muku Shirai. Multiple retailers have also opened reservations with different benefits.

The most unusual component may be the bonus SS. While the manga's main storyline is still catching up with earlier novel material, the extra story is described as touching slightly on developments after the light novel's final Volume 7. Exactly how much it reveals about the post-ending situation will only become clear once the book is released.