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. Spider's Nest by Minekura Kazuya

2. Nice to Meet You, Young Lady by Kouga Yun

3. Holly Green and White Little Garden by Takayama Shinobu

4. The Situation of Goshogawa Yuzuru's Magnificant Mansion Creation by Miyamoto Fukusuke

5. Butler of Worry by Higashiyama Kazuko

6. Elevenses by Mikanagi Touya

7. The Incident of the Butler's Birthday Project by Saeki Yashirou

8. Le Droit d'aimer by Haibara Yaku

9. Young Lady's Butler by Yoneyama Setsuko

10. The Melancholy of the Irritable Boy and Butler by Kikuta Yui

11. The Moon and the Visitor by Nanjou Tsugumi