Two couples dissatisfied with their sex lives indulge in excitement beyond their daily routines… Tsuyoshi's wife, Asahi, who is eager to try swinging, proposes the idea to the harmonious couple, Norio and Yumi. Initially, the husbands can't hide their bewilderment, but they can't contain their arousal at the sight of their wives writhing with another man's cock. Lewd acts performed without regard for time or place escalate beyond the boundaries of marriage. Shame turns into excitement, and desire knows no bounds as they drown in pleasure. The two couples, having experienced new thrills, are lured into a new world by 'swinging'…
