From a world overflowing with light—family, friends, school, cinema, and countless everyday wonders—she tumbled into absolute darkness. When consciousness returned, she discovered herself transformed into a demon. Through years of carefree existence in the demon realm, an encounter with a supremely powerful being stirred her memories. The yearning for that distant world of light grew unbearable until she surrendered to a summoning magic circle in desperation. Her eyes opened to an impossible truth: she had become a human infant in the Holy Kingdom. But she remained fundamentally a demon, hidden beneath fragile newborn skin. Powerless as a child and facing certain death if exposed, she grapples with her fractured identity. Is she human or demon? Which existence defines her? Can she survive this precarious new life, caught between two incompatible worlds, hiding the secret that could destroy her?