Within a dream suffused with radiance encompassing family, school, friends, and life's ordinary moments, a young woman transitions from youth to maturity before descending into darkness within a white abyss. Awakening from this reverie, she finds herself transformed into a demon in a realm where carelessness reigns until a fateful encounter alters her perspective. Longing for the light-drenched world she once inhabited, she impulsively ventures into a summoning spell, only to awaken anew as an infant human in the Holy Kingdom. Stricken with fear at her weakened state compared to her former demonic prowess, she grapples with her dual identity, uncertain of her survival in this unfamiliar terrain where the distinction between human and demon blurs.