While their husbands are at work, housewives who have nothing to do and are frustrated gather together as usual and drink wine. Then "Mizuki" says she bought new underwear and wants them to see it, so she lifts her skirt and shows off her sexy O-bak. At the same time, she recommends that the other wives buy lingerie that exposes their butts, and proposes that they try to see how many men other than their husbands they can seduce with those erotic undergarments...