It's the end of the year. Daisuke, a young man who's finally been able to take a long vacation for the first time in a long time, decides that he should let his wife visit her hometown for once, so he travels all the way by train to a peaceful mountain village with his wife. When they arrive at his wife's parents' house, his wife's mother, Kaori, greets him warmly, her beautiful smile still as beautiful as ever. "It's so nice to see you back..." "Please feel free to make yourself at home, Daisuke..." As he gazes upon his wife and mother-in-law laughing happily, Daisuke suddenly feels something hot well up in his lower abdomen. His mother-in-law. His wife's mother, Kaori. As a young man, Daisuke is drawn to the ripe, voluptuous curves of a woman in her mid-forties, and as a man, he is aroused...