The beautiful mother, Sayaka, lives with her son, Takashi. Though their days are filled with happiness, she's been feeling lonely without her husband, who's been away on a long overseas assignment. One day, when Takashi's old friend Ken came over to watch a popular romance drama, he suddenly kissed Sayaka. Despite her resistance, her heart raced uncontrollably. Afterward, Ken continued to press her, and Sayaka, unable to resist, found herself succumbing to his pleasure...