The Zero-Sum Original Anthology Series features themed oneshots from various mangaka that publish in Ichijinsha's Zero-Sum and Ward magazines. Volume 10 theme: Conflict and Secret Societies.

1. Ranpo-sensei Laughs Like This by Takayama Shinobu
2. Secret Mission by Saeki Yashiro
3. Fang by Kawazoe Mariko & Nakamura Sachiko
4. Black Swastika Army by Katagiri Ikumi
5. Mushroom and Kappa - A Fierce Conflict of Honourable Men by Magami Guriko
6. Boys’ Cavalry by Kayase Shiki
7. Rindou by Asada Yasuka
8. Hideout by Sekka
9. Un Orso by Mizuhara Kenta
10. Be Enthusiastic, Father! by Inui Miku
11. A Promise by Seno Tatsune & Takamiya Aya
12. Let’s Meet at the Secret Society by Kinoshita Sakura
13. Will O' the Wisp by Kouzuki Leo
14. The Village of the Secret Agreement by Ueda Shinshu
15. At the End of an Endless Desire by Akai Higasa
16. Demon King Time by Kanou Ruri
17. Messenger of Justice ★ Moonlight Organisation by Usaki Hitomi

Yohei’s father has been training him to become a ninja since he was a young boy. One day, Yohei is given his final test – to defeat his father.

Volume 8 : Butler 21. Mr. Finding by Takayama Shinobu2. Butler Hassle by Saeki Yashiro3. From Today, I’m a Butler! by Miyamoto Fukusuke4. Butler Game by Asahina Asato*5. Le Droit d'aimer by Haibara Yaku6. The Apprentice Butler and His Mistress by Yoneyama Setsuko7. Brilliant Emerald by Seno Tatsune & Takamiya Aya8. The Nagging Butler Likes Troublemakers by Geni Yuu9. Tarte Tatin by Mikanagi Touya10. The Mistress’ Favourite by Kawazoe Mariko & Nakamura Sachiko11. A Distance at Which Tea Doesn’t Cool by Kosugi Mayu12. The Master, His Butler and a Magical Book by Mazaki Haruka13. The Courtyard Secret by Ishikawa Mushi & JAM14. The Butler Is Useless? by Asada Yasuka15. Butler-Battle by Akizuki Ichiha16. Mr. Butler by Usaki Hitomi* indicates oneshot being scanlated.

Volume 5 : Japanese Style and Samurai*1. The Overnight Rain Stops by Minekura Kazuya (or "Last Night's Rain Lifts")2. Our Detective Story by Saeki Yashiro3. The Thunder God and the Wind God by Gunjou4. Samurai Soul by Asada Yasuka5. Takeda-sama, the Town Magistrate by Mazaki Haruka6. Tenmatsu, the Kabuki Actor with a Charming Figure by Ueda Shinshu7. Mushroom and Kappa - Arcana Compilation for Ninjas on Business Trips by Magami Guriko8. Confetti in the Fish Tank by Akanatsu9. Moonlight Sei-kun by Aoto Takane10. Urahara by Kouzuki Leo11. Pure Land Eye Story by Kayase Shiki*12. The Queen’s Dog by Araishi Ikkyou & Oshino Hikaru*13. Kakure Oni by Mikanagi Touya14. Absolute Obedience, The Peach's Rebellion by Yoshizawa Tomoya*15. Miokuribana by Kikuta Yui16. Swordplay by Shindou Arashi* indicates scanlation of oneshot.

A demon kills married couples while an angel tries to stop her, but cannot. Why?