The Zero-Sum Original Anthology Series features themed oneshots from various mangaka that publish in Ichijinsha's Zero-Sum and Ward magazines. Volume 4 theme: vampires.

1. Sleeping Vampire by Kinoshita Sakura 2. Mushroom and Kappa by Magami Guriko 3. Crossing the River by Kouga Yun (prologue to Satou-kun to Tanaka-san: The Blood Highschool) 4. A Shower in the sunshine by Omote Sora 5. Urban Vampire by Bikke 6. Sky Burial by Takayama Shinobu 7. Today's Dining Table by Saeki Yashiro 8. The Aegis of the Coffin of Time by Yugyoji Tama 9. Forest of Nobility by Kayase Shiki 10. Chiyo-sama! by Shindo Arashi 11. Strigoi Kingdom by Serikawa Mame 12. The Catharsis of Truth by Inui Miku 13. Blood Donation Advice by Igarashi Ran 14. The Novice Vampire by Amamiya Azusa 15. A Gentle Temperature by Kisaragi Yoshinori