Infiltration Gachi coverage! A certain forbidden top secret spot in the underground of the big city, beasts covered with wriggling carnal desires! Infiltrate the rumored underground playhouse! …Swapping orgies are held several times a month by a couple whose life is SEX. Sex YES, children NO! It is said that it costs ○ ten thousand yen just for the monthly rubber fee. Would you like to take a peek into the world that ordinary people cannot understand?
