Coffee shops that don't wear underwear, as the name implies, are called by waitresses who wear miniskirts but don't wear underwear at the bottom to attract male customers who are addicted to wine.

At the beginning, the appearance of this kind of porn industry just wandered on the edge of the law, taking advantage of the loophole that dress etiquette, a waitress, had never been stipulated in the relevant Japanese laws, and attracting customers with this kind of hidden nudity that is easy to reveal spring scenery carelessly.

However, the business model of coffee shops has gradually deteriorated. In addition to the fact that the waitress's clothing is getting closer and closer to the legal limit of directly exposing three points, there are even cases where the outer space of the storefront is a general coffee shop, but the waitress leads the male guests into another box and secret room to provide other further pornographic services (according to the law at that time, it is illegal only for men and women to directly contact the sexual organs, so there is a large fuzzy area for pornographic workers to play).