The Zero-Sum Original Anthology Series features themed oneshots from various mangaka that publish in Ichijinsha's Zero-Sum and Ward magazines. Volume 1 theme: Butlers

1. Kumo no Su (Spider's Nest) 2. Ojousama Hajimemasita (Nice to Meet You, Young Lady) 3. Holy, Green to Shiroi Hakoniwa (Holy Green and White Little Garden) 4. Goshogawa Yuzuru no Karei naru Katei Jijou (The Situation of Goshogawa Yuzuru's Magnificant Mansion Creation) 5. Butler of Worry 6. Elevenses 7. Otanjoubi Kikaku Shitsuji Hen (The Incident of the Butler's Birthday Project) 8. Le Droit d'aimer 9. Ojousama no Shitsuji (Young Lady's Butler) 10. Iraira Shounen no Shitsuji no Yuuutsu (The Melancholy of the Irritable Boy and Butler) 11. Tsuki to Houmonsha (The Moon and the Visitor)