Couple swapping! Separated by a thin wall! Hearing lewd sounds from next door, suspicion arises! The ignited affair between W and her lover SDAM-016

The project, which aimed to teach couples the secrets to a good relationship, recruited two couples. They separated the couples and had someone listen to the obscene kissing sounds from next door (actually, a recording was played), causing them to become suspicious and aroused at the same time, thus leading to wife-swapping sex.