In the Showa era of the 1970s, wife swapping and orgies were popular, and even into the Heisei era, they continued among young and middle-aged couples. Evolving from consensual couple swapping, large-scale orgies hosted by swapper magazines were held in family rooms at famous hotels. This work also includes a section that excavates and releases rare shocking orgy tapes filmed 40 to 50 years ago. It presents eight stories of Japan's ongoing couple swapping and orgies from Heisei to Reiwa, including the first-time orgy of young couples in a peep show room in a building next to a fire-damaged adult entertainment building in Kabukicho, night-visit orgies still practiced in a mountain village in Shikoku in the Reiwa era, orgies where a beautiful wife and husband who are orgy enthusiasts seduce a chaste big-breasted wife and husband, and sex parties that middle-aged couples join to improve their sex lives. This is the first volume of a permanent collector's edition.