Misa Kudo's first marital quarrel occurred when she discovered her husband's infidelity. After that, her husband's attitude changed completely—conversations ceased, and their lives drifted apart. Burdened by the stress, she impulsively accessed an affair-focused social network. Upon arriving at the hotel, the man stared at her with a lewd gaze. As he gently kissed her, she blushed but tightly clung to him in return... This fleeting emotional tremor set the story in motion.