Wood Kingdom Moons

Kasai Tadahisa, a handsome yet ordinary Japanese engineer who lived somewhere in Tokyo, died of overwork, and got reincarnated as a trashy third prince of Thaloria Kingdom, Third Prince Cain Vailtair Thaloria, in a mediavel world filled with knights and witches. However, he finds out he has a System that lets him access all modern blueprints from his previous life. He finds himself exiled by his father Alexander Cain Thaloria to the distant Frostmark Province, neglected by corrupt, negligent officials, and often overrun by wild shadow beasts and raiders from neighboring kingdoms. Will he take advantage of his System and turn the situation around?

His name was Zyren Drakos—a name whispered like a curse and remembered like a legend. Once left to die on the blood-soaked battlefield of the fallen Aetherion Kingdom, Zyren’s fate should have ended there. But death had other plans. Rescued by a notorious poison master shunned by the martial world, Zyren was reborn—not as a soldier, but as a living weapon. Trained in silence and shadows, he mastered forbidden arts. Every breath he took, every enemy he struck down, carved his path in poison and vengeance. But everything changed the night he saved her—a courtesan cloaked in mystery and beauty, with secrets deeper than her smile. She gave him his first taste of love... and cursed him forever. Now, hunted by assassins, betrayed by allies, and chased by the ghosts of a war not yet over, Zyren fights not just to survive—but to uncover the truth. Because somewhere in the chaos, the courtesan vanished... and left behind a single message: “They were never after me… They were after you.”