Your life begins to change when you encounter a piece of underwear. Kei Fukatsu is a 34-year-old single temporary employee. Her dispatch contract is about to expire. Her boyfriend of seven years has never talked about marriage... She wonders if she will continue to live like this for the rest of her life, but when her friend recommends her to an underwear store, she discovers the perfect underwear for her. From the excitement she felt when she encountered her destined underwear, she takes a new step in her life.