The Revenge of Those Who Were Cheated On - The Wives Form an Alliance

Natsuko, a housewife who has been married for three years, is worn out from her daily life with her husband Yoshitaka, who has a big attitude. Every day she apologizes to him when he complains about something, and she longs to get out of such a daily routine. However, she has neither the confidence nor the experience to live on her own.
One day, when she returns home after canceling a family vacation, she witnesses her husband having an affair. Natsuko can't stand it and runs away from home. Suddenly, she is summoned by a friend from her college days...