My Little Brother Is The Academy’s Hotshot

In the last battle with the king of the drn race that killed countless humans, Rudd Denatos loses his comrades and biological elder brother, Aesir Denatos. The moment he slays an unidentified drn that appears before him, he returns to his days as an academy cadet. However, his brother, Aesir, a genius warrior doesn’t exist in the past world Rudd has regressed into. Trying to fill in the empty spot of Aesir, Rudd tries to prepare as much as possible before the strongest drn king, the Seventh Drn, appears. Will Rudd be able to find his older brother and avenge his parents?
The Drn Slayer Academy’s Hotshot
The Little Brother Is the Academy’s Hotshot; 용사 동생은 아카데미 고인물, The Hero’s Younger Brother Is a Deceased Person in the Academy