In order to enjoy the fruitful marital life from middle age, we will deliver the orgy feast of middle-aged couples who participated in couple exchange / swap party and married women who are about to reach middle age. It is also a guide work for swapping that couples can watch while holding their breath. Couple swapping and orgy swapping, which were popular in the Showa era, are now quietly booming as a new trend among middle-aged couples and couples in the Heisei era.
