Seraph of the End: I Am the First Trumpet

Christmas 2060: an unknown virus decimates humanity, sparing only children under sixteen. As civilization collapses, vampires emerge from the shadows to enslave the survivors. Dragged into a vampire city as a future blood bag, protagonist Baiye Qin faces a grim fate—until the mention of the notorious Lord Ferid Bathory triggers something unexpected. His memories of another world, Blue Star, come flooding back. Armed with knowledge from a past life, can he survive in a world where humans are cattle and vampires reign supreme?