Tập 3: Thói quen hàng ngày của Airi thay đổi khi cô kết bạn với Yumie và ngừng theo dõi người phụ nữ bí ẩn.

A middle school girl named Airi walks to and from school alone each day. Each morning, she looks for a young woman in a high-rise apartment window, wishing to befriend her. Each evening, she falls asleep listening to a radio host reading letters from listeners. One night, a letter describes a girl who looks up at the writer's window each morning, and Airi suspects it's from the woman. The next morning, she smiles up at the woman, and that night, another letter describes the smiling girl. Airi is elated, and smiling up at the window and listening to the letters becomes a daily routine. One day, she shares her math book with a classmate named Yumie, and they become fast friends and commute buddies. Eventually, she stops looking at the window and listening to the radio. Unbeknownst to Airi, the woman has decided to meet the smiling girl. One morning, Yumie stays home sick, so Airi walks to school alone. As she passes the apartment building, the woman wobbles and leans into the window. Suddenly, a billboard depicting the woman falls into the street, narrowly missing Airi. (Source: Wikipedia)

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