With the destruction of Nishi-Kawaguchi, the area that gave birth to the term "NK Style," it seemed as if the underground sex trade had been wiped out!! However, in 2016, a certain large bulletin board reported that an area that had overcome the red light district regulations was making a comeback!! It was in Setagaya Ward. There was a rumor that wealthy wives with too much free time were gathering and secretly operating hon-salon in the basements of their homes!! Even the authorities were shocked!! Who would have thought that a hon-salon was operating in secret in a corner of an upscale residential area!?