Seven Knights: Alkaid

A story that took place during a hiatus since the fall of the Skytrian Empire, before the war of destruction broke out. It was thought that the story had disappeared beneath the records. The jewel that gives the owner great power... After a war over the jewel, six countries on the continent of Asd decide to sign a peace treaty. Then the six fragments of the jewel got stolen and now the world falls into an even greater chaos... Prince Caleb of Tanesia, who was the only one who knew the kidnapper's face, was rescued by Serrea and Shan, the Holy Kingdom's investigative team, has all but lost his memories! Sabrina, the Knights Commander of Tanesia, has an offer for those who can recover fragments and stop the war. (Source: Kakao, translated and edited)