- Novel! Keroro Gunso: Love Explosion! 5 Minutes Before the End of Earth - ISBN 9784048539425
- 小説侵略!ケロロ軍曹 愛爆発!地球消滅5秒前!! Shuusetsu! Keroro Gunsou: Ai Bakuhatsu! Chikyuu Shuumetsu 5 (go)-byou Mae!!
- by Shota Asuka, illustrated by Mine Yoshizaki, title page (frontispiece) illustration by 愛姫みかん
- Novel! Keroro Gunso: Without the Challenger Figure!? - ISBN 9784048539432
- 小説侵略!ケロロ軍曹 姿なき挑戦者!? Shuusetsu! Keroro Gunsou: Sugata Naki Chousensha!?
- by 伊豆平成, illustrated by Mine Yoshizaki, title page by 愛姫みかん
- Novel! Keroro Gunso: To a Probable Legend - ISBN 9784048539449
- 小説侵略!ケロロ軍曹 たぶん伝説へ Shuusetsu! Keroro Gunsou: Tabun Densetsu he
- by 伊豆平成, illustrated by Mine Yoshizaki, title page by 愛姫みかん
- Novel! Keroro Gunso: The Deep Sea Princess de arimasu! - ISBN 9784048540858
- 小説侵略!ケロロ軍曹 深海のプリンセスであります! Shuusetsu! Keroro Gunsou: Shinkai no Purinsesu de arimasu!
- by 伊豆平成, illustrated by Mine Yoshizaki, body illustration by 愛姫みかん
- Novel! Keroro Gunso: Keroro vs. Keroro - Great sKy Duel de arimasu! - ISBN 9784048541688
- 小説侵略!ケロロ軍曹 ケロロ対ケロロ 天空大決戦であります! Shuusetsu! Keroro Gunsou: Keroro Tai Keroro - Tenkuu Dai Kessen de arimasu!
- by 伊豆平成, illustrated by Mine Yoshizaki
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