In their long marriage, the couple had fallen into a sexless relationship. Even when the wife tried to initiate intimacy, her husband would lose his erection just before penetration. However, the cause wasn't simply low libido, but rather a hidden fetish the husband harbored—deriving pleasure from being cuckolded. He asked his junior colleague at work to sleep with his wife. Initially reluctant, the wife gradually succumbs to the young man's advances and the thrill of being desired, eventually giving in to sex. In that moment, a new, aggressive sexual desire begins to awaken within her.