Legend of Duo

Synopsis

In the early 21st century, a mysterious virus that saps people's vitality brings humanity to the brink of extinction. The only cure is vampire blood, but this fact was kept hidden by the vampire community for a long time, creating a deep divide between humans and vampires and plunging the world into turmoil. Duo, a vampire who exposed this remedy to rescue humanity, is now regarded as a betrayer by his own species. The powerful vampire Zieg is assigned to track down Duo. Yet Zieg's allegiance is put to the test when his personal bond with Duo makes him doubt whether to complete his assignment or reconsider where his loyalties lie.