Miyuki worked part-time at a family restaurant since college, and one day she was courted by the store manager, leading to marriage. After getting married, due to her husband's job, Miyuki began dedicating herself entirely to housework. Initially, she found returning home more fulfilling than work, and her nights deepened the bond with her husband. But as time passed, her satisfaction with their relationship faded, and Miyuki became increasingly drawn to drinking parties with old friends. During one such night out, an encounter with an older man at a bar sparked a new temptation. Skillfully seduced, a secret affair begins...