Every time he visits her house, Koji begins to yearn for her mother, Ayame (Ayano Ichinose). Her strength as a single mother raising her daughter, her gentle generosity as she greets him, and her widowed, somewhat shadowy, transience allude to a Kokoro, mature sexiness that he finds himself drawn to. One day, he accidentally peeks at Ayame masturbating. Her neck is flushed red, and Koji can't contain his excitement at her lewd appearance as she slackens, letting out hot, rough sighs...