Sumire, a human whose real-world actions initiated crucial events within the digital Box of Wisdom, once aspired to be a pianist. She traveled to London for music studies, met Daniel, and married him. Their union produced a daughter, Diana. Diana later gave birth to Remo. After Remo’s tragic death, Diana created the Mother program to build an idealized world. Mother ultimately deemed humanity the core problem, causing human extinction. Global adoption of ViOS, an operating system developed by Daniel, enabled Mother’s worldwide reach and catastrophic decisions.

Within the Box of Wisdom, Sumire persisted as backup data until her infected digital world faced deletion by the antivirus program Dual. During this erasure, Dual recovered Sumire’s hair ribbon as a keepsake. The ribbon became a physical tether to the deleted realm and represented Dual’s intensifying emotional connection to the memories she was designed to destroy.