Shujinkou no Osananajimi ga, Mobu no Ore ni Guigui Kuru Vol. 4 Heads to Okinawa With “Crazy Maid” Futada Hiromi

Shujinkou no Osananajimi ga, Mobu no Ore ni Guigui Kuru (主人公の幼馴染が、脇役の俺にグイグイくる) has reached Volume 4, released by Dengeki Bunko on June 10, 2026.

Kazuki Ishii's second life has now entered summer vacation and a trip to Okinawa. What should have been a comparatively relaxed break introduces another unpredictable variable when he encounters Futada Hiromi earlier than he remembers from his first life.

> Light spoiler notice: This article discusses the official Volume 4 premise and several characters' positions in Kazuki's first life, but does not reveal how the volume's central conflict is resolved.

Quick Summary

• Japanese title: 主人公の幼馴染が、脇役の俺にグイグイくる
• Romanization: Shujinkou no Osananajimi ga, Mobu no Ore ni Guigui Kuru
• Short name: Osamobu / おさもぶ
• Format: Light novel
• Latest volume: Volume 4
• Author: Rakuda / 駱駝
• Illustrator: Komupi / こむぴ
• Publisher: KADOKAWA
• Imprint: Dengeki Bunko
• Volume 4 release: June 10, 2026
• Japanese price: ¥968 including tax
• Book format: Bunko
• Pages: 344
• ISBN: 978-4-04-916967-6
• Series status: Ongoing
• Published volumes: Four
• Volume 5: Not officially announced
• Protagonist: Kazuki Ishii / 石井和希
• Central heroine: Mikoto Hidaka / 氷高命
• First-life “romcom protagonist”: Teruhito Amada / 天田照人
• Core premise: Kazuki returns to the morning of his high school entrance after his first life ends tragically
• Kazuki's objective: Avoid the disastrous future he previously experienced
• Volume 4 setting: Summer vacation
• Main location: Okinawa
• Relationship thread: Kazuki's relationship with Mikoto remains unresolved
• New Volume 4 heroine: Futada Hiromi / 双田広海
• Hiromi's nickname: Crazy Maid / クレイジーメイド
• First-life role: One of Amada's heroines
• Timeline change: Kazuki encounters Hiromi earlier than he remembers
• Hiromi's request: She asks Kazuki to pretend to be her boyfriend
• Volume 4 direction: Romantic comedy, second-life tension, and an unknown new variable
• Series recognition: No. 7 in the New Work Bunko category of Kono Light Novel ga Sugoi! 2026
• Manga adaptation: Ongoing
• Manga artist: Sui Hokuto / 北斗すい
• Manga character design: Komupi
• Magazine serialization: Comic Dengeki Daiohji
• Serialization launch: June 29, 2026
• Kadokomi Chapter 1: July 28, 2026
• Next Kadokomi update: August 28, 2026

Volume 4 Cover and Manga Adaptation

A Summer Vacation That Was Supposed to Be Easier

Kazuki has spent his second life constantly acting to avoid the worst possible future that destroyed him the first time around.

When summer vacation finally arrives, he travels to Okinawa with friends. The trip creates room for a lighter part of his school life, although Kazuki still cannot consider his relationship with Mikoto settled.

That emotional uncertainty becomes the backdrop for Volume 4 before another problem appears on the beach.

Futada Hiromi Appears Earlier Than She Should

In Okinawa, Kazuki is suddenly approached by Futada Hiromi.

He immediately recognizes the name. In his first life, Hiromi was one of the heroines who appeared around Amada during the following school term and became known as the “Crazy Maid.”

The problem is timing. This meeting is not supposed to happen yet, and every deviation from the timeline Kazuki remembers makes his first-life knowledge less reliable.

Hiromi Wants Kazuki to Pretend to Be Her Boyfriend

Their first encounter quickly becomes more complicated when Hiromi asks Kazuki to pretend to be her boyfriend.

For Kazuki, the situation is suspicious not only because he knows where Hiromi fit into the first timeline, but because he is supposed to be nothing more than a background character outside Amada's heroine routes.

Volume 4 once again plays with the series' central irony: the harder Kazuki tries to escape the romantic comedy, the more its heroines move directly into his path.

Kazuki and Mikoto Still Have Unfinished Business

At the same time, Kazuki continues struggling with his own feelings toward Mikoto Hidaka.

Mikoto was supposed to be Amada's central heroine in the first life, yet Kazuki's return to the past changed that route dramatically and caused her to move toward him instead.

Volume 4 therefore does more than expand the heroine roster. It keeps asking whether Kazuki can still call himself a mere supporting character when his second life continues drifting farther from the original scenario.

The Manga Is Now Catching Up With the Light Novel

Outside the novels, the franchise has recently expanded through a manga adaptation.

The manga by Sui Hokuto, with Rakuda credited for the original work and Komupi for character design, began serialization in Comic Dengeki Daiohji VOL.154 on June 29, 2026.

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Chapter 1 later became available through Kadokomi on July 28. Its official page currently lists the next web update for August 28, 2026, while Chapter 2 has already appeared in Comic Dengeki Daiohji VOL.155.

The Series Also Ranked in Kono Light Novel ga Sugoi! 2026

Before reaching its fourth volume, the series received recognition in Kono Light Novel ga Sugoi! 2026.

KADOKAWA lists Shujinkou no Osananajimi ga, Mobu no Ore ni Guigui Kuru at No. 7 in the New Work Bunko category.

The result arrived during the series' first publication year after Volume 1 launched in January 2025. It has since grown into a four-volume novel series with an active manga adaptation.

Why This Matters

1) Kazuki's timeline knowledge is becoming less dependable

Hiromi appears at a different point than she did in his first life, making it harder for Kazuki to rely on past memories as a perfect survival guide.

2) Romantic comedy and second-life suspense still operate together

A fake-boyfriend setup sounds like a classic romcom trope, but every new heroine is also a potential danger to Kazuki because he remembers how badly the original timeline ended.

3) The franchise is entering an expansion phase

Four light novel volumes now run alongside a newly launched manga adaptation that is still receiving active updates.

Light Novel Information

Additional confirmed information currently includes:

• Volume 4 launched in physical and digital formats on June 10, 2026
• its official Japanese price is ¥968 including tax
• the physical edition contains 344 pages
• ISBN is 978-4-04-916967-6
• KADOKAWA publishes the series through Dengeki Bunko
• Rakuda is a Gold Prize winner from the 22nd Dengeki Novel Prize
• Volume 1 originally launched on January 10, 2025
• Volume 4 remains the newest book listed on the official series page
• no Volume 5 schedule has been announced
• Dengeki Bunko lists several retailer bonuses for Volume 4
• Gamers offers a four-page booklet
• Toranoana offers a bookmark
• Melonbooks offers an SS leaflet
• the manga credits Rakuda for the original work
• Sui Hokuto handles manga artwork
• Komupi remains credited for character design
• the manga began magazine serialization in Comic Dengeki Daiohji VOL.154
• Chapter 1 has been available through Kadokomi since July 28
• Kadokomi lists its next update for August 28
• the manga placed No. 1 in Nico Nico Manga's official Weekly Favorite Ranking for July 30–August 6, 2026
• Volume 4 details are available through Dengeki Bunko
• book data is available through KADOKAWA
• the official novel series page is available through Dengeki Bunko
• the manga is available through Kadokomi
• the manga's debut magazine issue is listed through KADOKAWA Comic Dengeki Daiohji VOL.154
• Kono Light Novel ga Sugoi! 2026 ranking information is available through KADOKAWA

Closing

Shujinkou no Osananajimi ga, Mobu no Ore ni Guigui Kuru Volume 4 moves Kazuki's second life into summer while making his future even harder to predict. The Okinawa trip brings him into contact with Futada Hiromi earlier than expected, introducing another heroine who should not yet be part of his current route.

Volume 4 remains the newest light novel release, while Volume 5 has not been announced. Meanwhile, the manga adaptation is actively running, with its next web update scheduled for August 28, 2026.