One day, Hikari, who is troubled by a lack of sex with her husband, is asked by her husband to join a "Spouse Swap Club". Hikari is vehemently against the idea of ​​a suspicious organization she has never heard of, but her husband persuades her and she gives in. She immediately begins swapping sex with a certain couple. At first, Hikari refuses, but she soon becomes addicted to the pleasure that she cannot feel with her husband... This lustful wife, who has been defeated by a penis, becomes addicted to sex.