Just on the other side of a wall from the rest of the world... an indoor erotic space! In their everyday lives, women wear masks of chastity with a straight face. They go about their daily lives wearing the masks of mother, wife, and sometimes daughter, but once they step back inside the house through the front door, they find themselves in a closed room, isolated from society. It is not uncommon in this world that when these women take off their public masks, their true faces turn out to be surprisingly lewd...