During a fierce battle with the dragon king responsible for the deaths of many, Rudd Denatos witnesses the loss of his comrades and his elder brother, Aesir Denatos. After defeating a mysterious dragon, he is unexpectedly transported back to his time as a cadet at the academy. Strangely, in this altered reality, his brilliant warrior brother, Aesir, is nowhere to be found. Determined to stand in for Aesir's absence, Rudd diligently prepares for the impending arrival of the formidable Seventh Dragon King. Can Rudd uncover the truth about his missing brother and seek vengeance for his parents?