Tetsuo Ando, a 46-year-old bachelor, is scraping by thanks to the inherited house from his parents. The woman who visits him is his 32-year-old brother's wife, Noriko Ando. Their relationship began half a year ago at a family gathering, when he forcefully made her take something in her mouth. Today... Noriko arrives, and they'll be fucking all 48 ways until evening. Though he's always been called a lousy brother, it seems his technique is unmatched. Noriko seems eager to be thoroughly embraced as well... (From Episode 1).