Daily masturbation just isn't enough... Yuri, a bisexual, sexually frustrated wife, sets her sights on Natsuki, a newlywed wife who moved in next door. While giving her advice on their sexless marriage, she also gives the straight wife a lesson in lesbianism... Natsuki, who is seduced by Yuri's soft lips, sensitive nipples, the pleasure of her persistent tongue, and the numbing cunnilingus, becomes addicted to Yuri and asks her, "Tomorrow, I want you to sleep with me in front of my husband..."