I killed my sister. Now I will live as her.

“I killed my sister. Now I will live as her.” Nobara and Kotori are identical twin sisters, perfectly balancing opposite personalities: mischievous Nobara and the quintessential good girl, Kotori. Following their father’s passing, the siblings' lives diverged as they went to live separately—Nobara with their grandmother, and Kotori with their mother. Tragedy strikes when the sisters briefly trade places. During this switch, Kotori is brutally murdered. Consumed by grief and the unbearable weight of guilt, Nobara watches as the devastating loss drains the color completely from her mother's hair, turning it pure white. Determined to shield her grieving mother from further anguish and atone for the fatal twist of fate, Nobara makes a harrowing choice: she will completely erase her own existence and live out the rest of her days as her fallen sister.