Haruka, a sixteen-year-old with long black hair and warm brown eyes, once treasured a hand mirror gifted by her mother in childhood. Following her mother’s death, the mirror faded from her thoughts until it vanished entirely. Years later, at a quiet shrine, she whispers a prayer for its return—a plea answered by Teo, a small fox-like creature who leads her to Oblivion Island, a hidden realm where abandoned objects dwell. Driven to recover her lost keepsake, Haruka ventures into this strange world, navigating labyrinthine challenges and confronting enigmatic adversaries.

Amidst trials demanding resilience and courage, she confronts waves of grief and longing, her resolve sharpened by memories of her mother. The quest also compels her to examine her strained bond with her father and the unresolved void left by her mother’s absence. Each step through Oblivion Island becomes a bridge between harrowing adventure and introspection, shaping her journey into one of self-discovery and quiet healing.