Five years ago, Hitomi Honda married a man she met at work. Their married life had been going smoothly until one day she suddenly began suspecting her husband of cheating. The trigger was a high-end hotel appearing on his credit card statement. When Hitomi asked him about it, he claimed it was for a business meeting with a company executive but refused to reveal the person's name. Her frustration and doubts continued to grow, and then one day her husband suddenly left home for two or three days. Since he rarely went on business trips before, Hitomi became increasingly anxious. After hiring a private detective, she discovered her husband was engaging in paid dating. Feeling betrayed, Hitomi grew determined to get back at him by having an affair of her own.