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