結婚して10年、美貌でスレンダー、女盛りの美空だが、夫はとあるメーカーの営業で出張ぎみで性生活には不満たっぷり。アダルトDVDを見てはオナニーの日々。。。ある日、夫が会社の上司を家に連れてきた。妻を見つめる上司の視線。つぶれた夫の横で、美空を愛撫し「言う事を聞かないと旦那を転勤させる」と脅す上司。夫との生活を守りたいためとSEXにも飢えていた美空は、逆らえずに上司のいいなりになってしまう。その時以来、美空は上司とのインモラルな情欲に堕ちていく。それを目撃してしまった夫は意外にも・・・。She's been married for 10 years, and she's beautiful, slender, and in the prime of womanhood, but her husband is a salesman for a certain manufacturer, and he's always on the road, so she's not happy with her sex life. She spends her days watching adult DVDs and masturbating. One day, her husband brings home his boss from work. The boss stares at his wife. The boss caresses Misora next to her excited husband and threatens to transfer her husband if she doesn't do what he says. Wanting to protect her life with her husband and hungry for sex, Misora can't resist and ends up at the mercy of her boss. Since that time, Misora has fallen into an immoral lust with her boss. Her husband witnesses this, and unexpectedly...