Series by Nikumaru
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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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Frequently asked questions
How many books has Nikumaru written?
We list 6 books by Nikumaru across 1 series, published between 2024–2026 — each shown in full reading order.
When is the next Nikumaru book coming out?
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.
What order should I read Nikumaru's books?
Read each series in publication order. A good place to start is “Someone's Girlfriend Vol. 1.” Open any series above for its complete numbered reading order.
Where can I buy Nikumaru's books?
Every title links to Amazon from its series page — see our affiliate disclosure in the footer for how that supports the site.
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.