Gayus and the beautiful but cruel sword-wielder Gigina are "special equationists," individuals that manipulate the equations that govern world's laws thus allowing fantastic and deadly results. These two bounty hunters are caught up in a battle with dragons in the city of Eridana and in the intrigue of great nations.

• Yoshimasa Hosoya
• Nobunaga Shimazaki
• Takanori Hoshino
• Sora Tokui
• Mutsumi Tamura