[Machine Translation] My sister, who worked at a bookstore, jumped off a building. On the same day she texted me that she had something she wanted to discuss with me. Kozueko, who moved to Tokyo upon her marriage and had been living a peaceful life, returns to her parents' house to meet with her co-workers to find out the reason for her sister's jump. What is it that has driven her sister into a corner? Her mother's excessive expectations and father's indifference, the cruel words of her co-workers, and a love affair that didn't go her way.... Tracing her sister's past is also a way of confronting Kozueko's own wounds...