Hangyakusha to Shite Oukoku de Shokei Sareta Kakure Saikyu KishiHangyakusha to Shite Oukoku de Shokei Sareta Kakure Saikyou Kishi; The Hidden Strongest Knight Executed in the Kingdom as a Traitor ~The True Strongest One went through Regression and Became a Hero on the Imperial Route~; 反逆者として王国で処刑された隠れ最強騎士 ~蘇った真の実力者は帝国ルートで英雄となる~; Hiệp sĩ bí ẩn bị hành quyết ở Vương quốc như một kẻ phản đồ ~Kẻ mạnh nhất tái sinh trở thành anh hùng phe Đế quốc~

The kingdoms strongest knight, Aldia, was the central figure in ending the war between the Kingdom of Leshfeld and the Vulcan Empire. Although Aldia became a hero, he was executed as a traitor for false reasons. With regret in his heart for being unable to save the Empires Princess Valtrune, who saved him when he was on the verge of death despite being enemies . However, when Aldia woke up, he found himself in a world six years before the war broke out! Determined to save Valtrunes life, which he could not do before, Aldia decides to pledge loyalty to the Princess as a knight of the Vulcan Empire in his second life and change the world! This is a regression story of a once-executed knight who returns to be the strongest again!!