In her fifth year of marriage at age 30, Saryu Usui was a successful career woman forced to take a leave of absence to focus on conceiving. Despite her hopes, pregnancy never came, and her relationship with her husband gradually grew cold. Feeling increasingly neglected, even in small matters that could have brought color to her life, emotional distance widened between them. Then, upon returning to work, she met Yusuke—a young, passionate man radiating a charm entirely different from her husband's. At first, he treated her like a junior colleague, but slowly, Saryu's heart began to change.