The newly married Asano couple and the Yamamoto couple. Asano and Yamamoto are acquaintances from a swingers club. Both have been playing the role of a good husband, married to a wife a year younger, but they're starting to want to come clean about their kinks and enjoy NTR as a couple. So this time, they asked the swingers club organizer to arrange and film a swapping party. Ayumu and Rui, despite being confused after hearing from their husbands, arrived at the hot spring resort. In the midst of the steam, a crazy husband-swapping and gangbang party begins!! [Unreleased footage from the amateur floor item number hmdnc773 has been added to the distribution.]