Someone's Girlfriend Books in Order
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The Someone's Girlfriend series by Nikumaru includes 6 books published between 2024–2026.
✓ All 6 books verified against the publisher's official series list.
Publication order
In the order the books were originally released.
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Buy on Amazon2024 · Nikumaru
This sexy romance manga follows one young man’s forbidden entanglement with his best friend’s girlfriend! Riku can’t get Shizuku out of his head to…
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Buy on Amazon2024 · Nikumaru
ALL ACCORDING TO PLAN... Umimi returns to her hometown to find things have changed quite a bit. Her old junior high boyfriend, Takuto, is now dating…
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Buy on Amazon2025 · Nikumaru
THE LOVE SQUARE STARTS TO COLLAPSE! Umimi will do anything to win back her ex--even enlist the help of her “big brother” Riku to break up a happy…
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Buy on Amazon2025 · Nikumaru
THE TRUTH WILL GET SOMEONE HURT! Riku has finally accepted his feelings for his beautiful and flirtatious childhood friend, Shizuku. Unfortunately,…
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Buy on Amazon2026 · Nikumaru
SUMMER HEATS UP! Riku’s crush is hard enough to avoid when school is in session, but now the two have picked up summer jobs at the same beach club.…
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Buy on Amazon2026 · Nikumaru
BREAKING POINT Riku’s summer break heats up to a boil! Three women compete for his attention, including his best friend’s girlfriend. While the two…
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✓ = numbering verified against the publisher's official series list.
📅 = publisher-announced release dates; subject to change. All upcoming releases →
Frequently asked questions
What order should I read the Someone's Girlfriend books in?
Read them in publication order, starting with “Someone's Girlfriend Vol. 1”. Start with “Someone's Girlfriend Vol. 1.”
How many books are in the Someone's Girlfriend series?
We list 6 books by Nikumaru , published between 2024–2026.
When is the next Someone's Girlfriend book released?
The next book is “Someone's Girlfriend Vol. 7”, book 7 in the series, expected Oct 13, 2026. That is the publisher's announced date and can change; this page updates when it does.
Where can I buy the Someone's Girlfriend books?
Each title above links to Amazon. See our affiliate disclosure.
Reading order compiled from author/publisher guidance and verified bibliographic data. Spotted a wrong order, a missing book, or any other mistake? and we'll correct it.