Light Novel Volume Zerö

Vampyres, Knights and Boobs: Zerö, also known as Light Novel Volume Zerö, is a special volume that is included in True Volume 5. There are events which happened also 30 years prior to Light Novel Volume 1 and how Percival and his friends became the new Seven Great Satans, how they took part in civil war of Hell against the other descendants of the original Satans.

Chapters

 * Chapter 1. Silver-haired Morning star of destruction
 * Chapter 2. Future of devils
 * Chapter 3. Those who surpass the satans
 * Chapter 4. The birth of Percival Lucifer and Ariel and Allan