Leon Klein was a hero who saved the world by defeating the Demon King. However, due to the kingdom’s betrayal, he was sent into a prison in the abyss. “Secret Quest“. In a hell with no exit, a tri...more

Leon Klein was a hero who saved the world by defeating the Demon King. However, due to the kingdom’s betrayal, he was sent into a prison in the abyss. “Secret Quest“. In a hell with no exit, a trial that will not end until one million magical beasts are defeated. After 10 years, Leon acquired the [Dark Attribute Magic] and escaped the abyss.