Transported to a magical realm, a reclusive twenty-year-old strives to craft a tranquil life as a shut-in, only to be forsaken by his royal parents due to his perceived feeble magical abilities. Left to fend for himself in a world teeming with mystical perils, the young prince not only survives but thrives, unaware of his immense latent magical prowess. Follow Haruto, the awkward recluse, as he forges bonds with demons, contends with royal conflicts and assassination schemes, unravels his alter ego as a secret hero, and copes with the role of an unexpected sibling.