A straight housewife, Yukie, whose husband's salary had been cut and who was looking for a part-time job, was approached by her friend, Yasuko, who suggested selling her unwanted items at an online flea market. However, Yasuko was in fact a lustful bisexual with an excessive libido, and had always had her eye on Yukie's mature body... It didn't take long for Yukie, who was frustrated by the lack of sex with her husband, to fall for her relentless lesbian acts...