{{Short description|Japanese manga series}} {{Use mdy dates|date=July 2024}} {{Infobox animanga/Header | image = Someone's Girlfriend vol 1.png | caption = First {{Transliteration|ja|tankōbon}} volume cover | ja_kanji = アイツノカノジョ | ja_romaji = Aitsu no Kanojo | genre = Romantic comedy<ref name="vol1Natalie">{{cite web|script-title=ja:親友の彼女が迫ってくる、禁断の1年間を描くNTRラブコメ「アイツノカノジョ」|url=https://natalie.mu/comic/news/512409|website=Comic Natalie|publisher=Natasha, Inc|access-date=July 19, 2024|language=ja|date=February 10, 2023|archive-date=December 1, 2023|archive-url=https://web.archive.org/web/20231201222503/https://natalie.mu/comic/news/512409|url-status=live}}</ref><!-- Note: Use and cite reliable sources to identify genre/s, not personal interpretation. Please don't include more than three genres (per MOS:A&M). --> }} {{Infobox animanga/Print | type = manga | author = {{ill|Nikumaru|ja|肉丸}} | publisher = Shogakukan | publisher_en = {{English manga publisher|NA=Seven Seas Entertainment}} | imprint = Sunday Webry Comics | magazine = {{ill|Sunday Webry|ja|サンデーうぇぶり}} | first = September 30, 2022 | last = November 21, 2025 | volumes = 8 | volume_list = }} {{Infobox animanga/Footer|portal=yes}}

{{Nihongo|'''''Someone's Girlfriend'''''|アイツノカノジョ|Aitsu no Kanojo|lead=yes}} is a Japanese web manga series written and illustrated by {{ill|Nikumaru|ja|肉丸}}. It was serialized on Shogakukan's digital platform ''{{ill|Sunday Webry|ja|サンデーうぇぶり}}'' from September 2022 to November 2025.

== Plot == {{No plot|date=April 2026}}

==Media== ===Manga=== Written and illustrated by {{ill|Nikumaru|ja|肉丸}}, ''Someone's Girlfriend'' was first published as a one-shot on Shogakukan's digital platform ''{{ill|Sunday Webry|ja|サンデーうぇぶり}}'' on November 27, 2021,<ref>{{cite web|script-title=ja:サンデーうぇぶりで新連載続々、「ジンメン」カトウタカヒロの読み切り4作品も|url=https://natalie.mu/comic/news/455008|website=Comic Natalie|publisher=Natasha, Inc|access-date=July 19, 2024|language=ja|date=November 25, 2021|archive-date=November 3, 2022|archive-url=https://web.archive.org/web/20221103055157/https://natalie.mu/comic/news/455008|url-status=live}}</ref> and was serialized on the same platform from September 30, 2022, to November 21, 2025.<ref>{{cite web|script-title=ja:1. 第1話 「始まりの日」|url=https://www.sunday-webry.com/episode/316112896879947791|website={{ill|Sunday Webry|ja|サンデーうぇぶり}}|publisher=Shogakukan|access-date=July 19, 2024|archive-url=https://archive.today/20221017104850/https://www.sunday-webry.com/episode/316112896879947791|archive-date=October 17, 2022|language=ja|date=September 30, 2022|url-status=live}}</ref><ref>{{cite web|last=Horie|first=Kuraha|script-title=ja:あなたの"居場所"に 「アイツノカノジョ」最終話「進め前へ」がサンデーうぇぶりにて公開|url=https://manga.watch.impress.co.jp/docs/news/2065273.html|website=Manga Watch|publisher={{ill|Impress Corporation|ja|インプレス}}|access-date=November 28, 2025|archive-url=https://web.archive.org/web/20251128154709/https://manga.watch.impress.co.jp/docs/news/2065273.html|archive-date=November 28, 2025|language=ja|date=November 21, 2025|url-status=live}}</ref> Shogakukan has collected its chapters into individual {{Transliteration|ja|tankōbon}} volumes, with the first one released on February 10, 2023.<ref name="vol1Natalie"/> As of December 12, 2025, eight volumes have been released.<ref name="vol8JP"/>

The manga has been licensed for English released in North America by Seven Seas Entertainment.<ref>{{cite web|last=Hodgkins|first=Crystalyn|title=Seven Seas Adds The Concierge at Hokkyoku Department Store, More Manga|url=https://www.animenewsnetwork.com/news/2024-03-28/seven-seas-adds-the-concierge-at-hokkyoku-department-store-more-manga/.209316|website=Anime News Network|access-date=July 19, 2024|date=March 28, 2024|archive-date=July 19, 2024|archive-url=https://web.archive.org/web/20240719062546/https://www.animenewsnetwork.com/news/2024-03-28/seven-seas-adds-the-concierge-at-hokkyoku-department-store-more-manga/.209316|url-status=live}}</ref>

====Volumes==== {{Graphic novel list/header |OneLanguage = no |Language = Japanese |Width = 70% }} {{Graphic novel list |VolumeNumber = 1 |RelDate = February 10, 2023<ref>{{cite web|script-title=ja:【2月10日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/511885|website=Comic Natalie|publisher=Natasha, Inc|access-date=July 19, 2024|language=ja|date=February 10, 2023|archive-date=March 19, 2023|archive-url=https://web.archive.org/web/20230319125312/https://natalie.mu/comic/news/511885|url-status=live}}</ref> |ISBN = 978-4-09-851600-1 |LicensedRelDate= August 27, 2024<ref name="SSE-official">{{cite web|title=Someone's Girlfriend|url=https://sevenseasentertainment.com/series/someones-girlfriend/|publisher=Seven Seas Entertainment|access-date=July 19, 2024|archive-date=July 19, 2024|archive-url=https://web.archive.org/web/20240719063037/https://sevenseasentertainment.com/series/someones-girlfriend/|url-status=live}}</ref> |LicensedISBN= 979-8-89160-277-9 }} {{Graphic novel list |VolumeNumber = 2 |RelDate = August 9, 2023<ref>{{cite web|script-title=ja:【8月9日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/534990|website=Comic Natalie|publisher=Natasha, Inc|access-date=July 19, 2024|language=ja|date=August 9, 2023|archive-date=August 11, 2023|archive-url=https://web.archive.org/web/20230811002910/https://natalie.mu/comic/news/534990|url-status=live}}</ref> |ISBN = 978-4-09-852773-1 |LicensedRelDate= December 17, 2024<ref name="SSE-official"/> |LicensedISBN= 979-8-89160-278-6 }} {{Graphic novel list |VolumeNumber = 3 |RelDate = January 12, 2024<ref>{{cite web|script-title=ja:【1月12日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/555843|website=Comic Natalie|publisher=Natasha, Inc|access-date=July 19, 2024|language=ja|date=January 12, 2024|archive-date=February 15, 2024|archive-url=https://web.archive.org/web/20240215232019/https://natalie.mu/comic/news/555843|url-status=live}}</ref> |ISBN = 978-4-09-853083-0 |LicensedRelDate= April 22, 2025<ref name="SSE-official"/> |LicensedISBN= 979-8-89160-929-7 }} {{Graphic novel list |VolumeNumber = 4 |RelDate = June 11, 2024<ref>{{cite web|script-title=ja:【6月11日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/575239|website=Comic Natalie|publisher=Natasha, Inc|access-date=July 19, 2024|language=ja|date=June 11, 2024|archive-date=June 13, 2024|archive-url=https://web.archive.org/web/20240613085938/https://natalie.mu/comic/news/575239|url-status=live}}</ref> |ISBN = 978-4-09-853397-8 |LicensedRelDate= September 9, 2025<ref name="SSE-official"/> |LicensedISBN= 979-8-89373-735-6 }} {{Graphic novel list |VolumeNumber = 5 |RelDate = October 10, 2024<ref>{{cite web|script-title=ja:【10月10日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/593233|website=Comic Natalie|publisher=Natasha, Inc|access-date=October 9, 2024|language=ja|date=October 10, 2024|archive-date=October 10, 2024|archive-url=https://web.archive.org/web/20241010010314/https://natalie.mu/comic/news/593233|url-status=live}}</ref> |ISBN = 978-4-09-853624-5 |LicensedRelDate= January 20, 2026<ref name="SSE-official"/> |LicensedISBN= 979-8-89561-186-9 }} {{Graphic novel list |VolumeNumber = 6 |RelDate = February 12, 2025<ref>{{cite web|script-title=ja:【2月12日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/609373|website=Comic Natalie|publisher=Natasha, Inc|access-date=April 11, 2025|language=ja|date=February 12, 2025|archive-date=February 11, 2025|archive-url=https://web.archive.org/web/20250211232937/https://natalie.mu/comic/news/609373|url-status=live}}</ref> |ISBN = 978-4-09-853846-1 |LicensedRelDate= May 12, 2026<ref name="SSE-official"/> |LicensedISBN= 979-8-89561-923-0 }} {{Graphic novel list |VolumeNumber = 7 |RelDate = August 8, 2025<ref>{{cite web|script-title=ja:【8月8日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/634252|website=Comic Natalie|publisher=Natasha, Inc|access-date=August 8, 2025|language=ja|date=August 8, 2025|archive-date=August 7, 2025|archive-url=https://archive.today/20250807150321/https://natalie.mu/comic/news/634252|url-status=live}}</ref> |ISBN = 978-4-09-854125-6 |LicensedRelDate= October 13, 2026<ref name="SSE-official"/> |LicensedISBN= 979-8-89765-936-4 }} {{Graphic novel list |VolumeNumber = 8 |RelDate = December 12, 2025<ref name="vol8JP">{{cite web|script-title=ja:【12月12日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/650516|website=Comic Natalie|publisher=Natasha, Inc|access-date=December 12, 2025|language=ja|date=December 12, 2025|archive-date=December 11, 2025|archive-url=https://archive.today/20251211150034/https://natalie.mu/comic/news/650516|url-status=live}}</ref> |ISBN = 978-4-09-854364-9 |LicensedRelDate= — |LicensedISBN= }} {{Graphic novel list/footer}}

===Others=== As part of a collaboration between ''Weekly Shōnen Sunday'', ''Sunday Webry'' and the music project Maisondes, a music video with a song, titled "Furi", composed by Daibakuhashin, performed by Rei and based on the manga was uploaded to the Maisondes' YouTube channel on April 4, 2025.<ref>{{cite web|script-title=ja:天使な小生意気、写らナイんです…サンデー作品をAKASAKIやナユタン星人が楽曲化|url=https://natalie.mu/comic/news/616338|publisher=Natasha, Inc|website=Comic Natalie|date=March 19, 2025|access-date=April 11, 2025|language=ja|archive-date=March 19, 2025|archive-url=https://web.archive.org/web/20250319081823/https://natalie.mu/comic/news/616338|url-status=live}}</ref><ref>{{cite web|script-title=ja:MAISONdes×『サンデー』コラボプロジェクト 日曜日のメゾンデ、第2弾楽曲「ふり」リリース＆MV公開|url=https://realsound.jp/2025/04/post-1979418.html|website=Real Sound|publisher=Blueprint Co. Ltd|access-date=April 11, 2025|date=April 4, 2025|language=ja|archive-date=April 4, 2025|archive-url=https://web.archive.org/web/20250404031242/https://realsound.jp/2025/04/post-1979418.html|url-status=live}}</ref>

==Reception== The series was nominated for the 2023 Next Manga Award in the web manga category,<ref>{{cite web |last=Loveridge |first=Lynzee |title=Voting Opens for Next Manga Awards 2023 |url=https://www.animenewsnetwork.com/interest/2023-06-25/voting-opens-for-next-manga-awards-2023/.199604 |website=Anime News Network |access-date=July 19, 2024 |date=June 25, 2023 |archive-date=June 26, 2023 |archive-url=https://web.archive.org/web/20230626074050/https://www.animenewsnetwork.com/interest/2023-06-25/voting-opens-for-next-manga-awards-2023/.199604 |url-status=live }}</ref> and ranked 20th in the same category in 2024.<ref>{{cite web|script-title=ja:「次にくるマンガ大賞 2024」1位に「カグラバチ」「ふつうの軽音部」|url=https://natalie.mu/comic/news/588589|website=Comic Natalie|publisher=Natasha, Inc|date=August 28, 2024|access-date=September 2, 2024|language=ja|archive-date=September 1, 2024|archive-url=https://web.archive.org/web/20240901034535/https://natalie.mu/comic/news/588589|url-status=live}}</ref>

==See also== *''Bad Girl'', another manga series by the same author

==References== {{reflist}}

==External links== * {{Official website|https://www.sunday-webry.com/episode/316112896879947791|Official website at ''Sunday Webry''}} {{in lang|ja}} * {{Anime News Network|manga|28991|noparen=true}}

{{Sunday Webry}}

Category:Anime and manga set in schools Category:Japanese webcomics Category:Romantic comedy anime and manga Category:Shogakukan manga Category:Shōnen manga Category:Seven Seas Entertainment titles Category:Webcomics in print