Minoru Kagenou has long pursued strength in secrecy, blending in as an ordinary student by day while fiercely battling biker gangs by night. After a tragic accident, his yearning for power seems dashed until he is reborn as Cid, a noble's second child, in a magical realm. Embracing his newfound abilities as 'Shadow,' he forms Shadow Garden to confront the real-world manifestation of his imagined foe, the Cult of Diablos, only to discover that this enemy is more than just a figment of his imagination as his group expands and the threat looms larger.