吸血姫としもべ

Lysandra, an immortal cursed to survive on blood, guards the Tetra Vessel. A century ago, she slept to protect it; now Kian Ryn’s blood awakens her, and she claims him as her servant. He resists but indulges unconsciously. When the vessel is targeted, their search uncovers the Ryn’s scandal, the real Tetra Vessel is always with Kian… Will they stand together, or be torn apart by the truth?