Recently, a married woman named Keiko, who is unsatisfied with her husband's performance and feels sexually frustrated, vents her frustrations to her neighbor friends, Marina and Yuu. The two, who are stress-free, warn her, 'If you keep this up, you'll wither away as a woman.' Feeling anxious, Keiko asks them how they deal with their sexual frustration, only to find out that they release it by having sex with men other than their husbands! Shocked by her friends' infidelity, Keiko also finds their reckless sex lives enviable...
