Sayuri is a slender milf raising her son Akira alone after her divorce. Though somewhat naive, she believed she had raised Akira to be a kind-hearted boy. One day, Akira's friend Jiro suddenly confesses: "Akira is shoplifting." Shocked, Sayuri eyes Jiro with suspicion—but when he presents undeniable evidence, her resolve begins to crumble. Under the condition that he keeps silent, she finds herself forced to obey Jiro's commands. What follows is a series of events that shatter the beliefs she once held dear.