Rowan, prince of the small kingdom Wex, transmigrates from the modern world to a medieval magical continent. Yet he is unable to awaken magical power, and is branded a worthless failure. During the magic aptitude test at Starfall Academy, his mana level registers as Zero-Tier. His fiancée Isla, a Sixth-Tier genius, publicly humiliates him and breaks off their engagement. After this disgrace, Rowan accidentally awakens the Beast Harvest System, which allows him to gain experience points, level up, and loot equipment by slaying magical beasts.