A kind act leads ordinary office worker Gu Chen to rescue the drowning dog Haki, and brings him into an arranged marriage under the same roof with group CEO Song Yunshu, pushed together by their elder. Complete strangers before marriage, they find themselves facing each other daily after tying the knot—she is cold and powerful, while he is stubborn and clear-headed, neither willing to yield first. Yet warm home-cooked meals, late-night hot soup, and shoulder-to-shoulder teamwork at the workplace quietly warm both hearts. Amid outside scrutiny, vast differences in status, and successive real-world trials, can they turn this accidental encounter into a lifelong journey toward each other?