Shizuko passionately pursued her daily ballet lessons, dedicating herself fully to the art. One day, upon returning home from practice, her son Ataru told her, "I want to try ballet too." Overjoyed, Shizuko immediately began teaching him ballet. However, as days passed, Ataru's behavior and attitude started to change, making Shizuko sense that something was off. Though she noticed the shift, she found herself unable to confront the unsettling truth.