The man once known as the strongest sage reincarnated as a 6-year-old boy – Eddie.Having retained the memories of his previous life, having exceeded his previous peak, he came to a decision. — To stay in the shadows instead of becoming the greatest sage. Eddie buried his memories of obliterating the Demon King and enrolled in the Royal Academy as a normal 6-year old boy. Of course, after the death of the Demon King, he nurtured his retainers and acted as the Ruler of Darkness in secret. Sometimes the Ruler of Darkness.Sometimes a freshman in the magic academy. This is a story of the strongest juvenile sage and those who swore loyalty to him.