What are the "six hours of sex"? They are the hours between 9 pm on Christmas Eve and 3 am on Christmas Day, the time when it is said that the most people have sex in a year. Mayu is a hard-working office lady and her soothing stay-at-home husband, Iori. They have been dating since high school, and even after getting married, the two are a perfect match and live a happy married life. Except for one thing... On Christmas Eve, after eating the sumptuous dinner prepared by Iori and enjoying their time together, Mayu asks Iori what he would like as a gift to show his appreciation. Although he was hesitant at first, Iori's expression suddenly changed... "I want to eat you, Mayu... No...?" Iori, who is usually gentle and soothing, gave her a carnivorous, masculine expression, which made her pussy twitch and melt in an instant...? The only thing that bothers Mayu about her married life with Iori is that Iori is a monster of huge penis and insatiable stamina who never tires...! A 6-hour non-stop, loving, breeding sex session begins!!