An ordinary white-collar worker from the city transmigrates to a strange country in an alternate history. She opens a shop and makes a fortune, expecting to settle into a peaceful life, but instead becomes the prime minister's daughter and helps the Ninth Princess seize power. He is a noble prince who goes to fight on the frontier, but falls in love with her for life. Neither of them seeks a passionate, all-consuming romance. They only want a love that grows steadily over time, with its warmth and cold known only to them.
