Zero no Dai Kenja: Wakagaetta Saikyou Kenja wa Shoutai wo Kakushite Nariagaru
ゼロの大賢者 ～若返った最強賢者は正体を隠して成り上がる～
Siegfried, a grand hero of the Great Sage, is betrayed by his trusted ally Gilbald, who strips him of his rank, reputation, and power. Banished to the Forest Without Return, he meets a dying vampire girl. After giving his blood to save her, he is transformed into a vampire and reborn as a young man. Regaining immense magical abilities and vampire traits, he adopts the name "Zero" and seeks vengeance against Gilbald with the vampire girl by his side.
