Recently, Mizuki has almost no sexual relations with her at night, and she has almost forgotten who she is as a woman. One day, her neighbor Yusuke returns home for the first time in a while, and for some unexpected reason ends up staying over at her house... That night, Mizuki happens to kiss him, and her body unintentionally starts to tingle. "I'm just an old lady, is it really okay?" she wonders, but once she gives in, her body becomes uncontrollable, craving pleasure...