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Ayumi, a mother who raised her daughter Mika alone, is relieved that she has gotten married. She is about to start a new life, thinking that "this time I will find my own happiness," but she breaks up with her boyfriend... At that time, her daughter and her husband, who are building a house, come to stay with her for a while. Disappointed, Ayumi begins to feel a sense of manliness in her son-in-law, Hideki, who always treats her with pleasure, and her uterus starts to ache. Meanwhile, Hideki is attracted to Ayumi's charm, which his wife does not have, and he cannot suppress the emotions that well up inside him...