The Forsaken Mecha King: Back for Reckoning

Swapped at birth and raised in the slums for eighteen brutal years, Kayn is finally reclaimed by his true family after single-handedly slaying an alien Insectoid—only to find that Ethan, the impostor who stole his life, has been quietly manipulating the entire household with practiced innocence. Now Kayn must fight his way back through family politics, academy rivals, and mech duels to reclaim everything that was always his.