The Guin Saga

A side story of the 100+ volume novel series. After awaking in a forest with a leopard mask attached to his head and no memory of his past, the peerless warrior Guin survives the treacherous wilds of Nospherus and the mean intrigues of the Middle Country. Now, as King of Cheironia, he must contend with dark forces that dare to prey on his realm. In this three-volume series, King Guin must battle a plague made manifest and controlled by hostile magic. But even if our mighty hero vanquishes the Black Plague, how will he ever defeat the combined forces of powerful magi? (Source: Kodansha USA)

In ancient times, the King of Paroh is savagely murdered with his wife and servants in his castle by mercenaries from the Gohra army. Only his children, Prince Remus and his twin sister Princess Linda managed to escape during the massacre in the surrounding forest. Quickly caught up by bloodthirsty murderers, they are saved by a strange-warrior with the face of a leopard. Suffering from amnesia, the mysterious savior only remembers his name: Guin. Twins explain him their situation and decides to help Guin hoping to learn more about its origins. On their way, they meet some allies including a young girl from an ape-people, a mage and a mercenary by the name of Isht Van. The small group will rally the tribes Sem and legendary giants, the Lagons, to expel the invaders and to avenge the massacre committed by Gohra.