After suddenly waking up transformed into a weak serpent, a girl named Amira discovers she has been bonded with a low-level Void Beast on a new world where everyone commands such creatures. Facing ridicule for her 'pathetic' beast and desperate to break the bond, she defies her professor's warnings about fatal consequences and attempts to terminate the bond forcibly. Despite being rejected and discarded, Amira's strong survival instinct triggers the activation of the mysterious DevourPro System, granting her a new skill called Devour, setting the stage for a sudden shift in her fortunes.