The drama describes how Sakurai Kasumi (Harada) who had met a boy during her childhood and they had exchanged promises to meet again. However, the promise remains as a secret deep within Kasumi as she grows up to become a 45-year-old single mother who is struggling to survive in her job at a laundromat. Just then, she meets a designer Ozawa Yurin (Saito) who she falls in love with. Kasumi then starts to wonder if Yurin's appearance was a coincidence or whether he was the boy she met as a child. Being in very different circumstances, their relationship path is destined to be bumpy as the people around them are also affected by their love for each other.
Co-stars include Yamaguchi Sayaka who plays Shirai Maho, the wife of a major furniture manufacturing company's president and has an affair with Yurin.