I Lost an Arm, They Lost Their Son

The story

True heir Kai of Hale was framed and exiled. He lost his left arm to beasts. Back home, he endured family humiliation and was forced to sign a death contract for the fake heir. Marshal Ash tore the contract to save him. The impostor mutated and unleashed a beast horde. Kai defeated the monsters with his mechanical arm, saved the city. He cut ties with his toxic family, left with his grandfather, and began a new journey with Ash.