Legend of Duo

In the 2000s, humans lose purana, vital for survival, leading to the species' decline. A vampire named Duo intervenes by revealing the secret of purana, offering a chance to prevent extinction. However, this act violates a sacred taboo, and Duo faces punishment for his transgression. In a past mythical age, a god was eternally punished for giving fire to humans, and Duo's fate mirrors this. His punishment is carried out by Zieg, another vampire who was once his close friend.