The Boy I Saved Becomes the Mech King

Young Rex earns pocket money selling lemonade beside his worn-out mech, Wisp, until the legendary Mech King Victor steps in to rescue him from a swarm of bug-beasts. As a parting gift, Victor hands the boy a mech core and a warrior badge. Years later, Rex has grown wealthy, and he finds the once-mighty Victor ruined, abandoned by his treacherous heirs and hounded by a rival named Samuel. Rex must decide whether to repay the debt he owes.