He had been married to Sumire for four years and although they had no children, they lived happily. Sumire supported him as a full-time housewife, and his work was going well, so he went on a three-day business trip to secure a large contract. On the first day of the business trip, when he returned to the inn after finishing the business meeting, he felt an indescribable unease as he noticed a figure and voice that looked like his wife's, so he followed her and peeked into the room where the woman who looked like his wife had entered, and there he found his wife passionately kissing a stranger. He was overcome with intense anger and despair, but he couldn't take his eyes off her...