Four years into marriage with Sumi, they had been living a happy life together. Though they didn't have children yet, Sumi supported the household as a devoted homemaker while her husband's career flourished. When he landed a major contract, he left for a three-day business trip. On the first day, after closing the deal, he returned to his inn and noticed a figure with a back and voice strikingly similar to Sumi's—yet something felt off. Drawn by that voice, he peeked into the room and saw Sumi passionately kissing an unfamiliar man. Shock, rage, and despair gripped his heart, yet he couldn't look away...