|Odate Mai is the daughter of the president of a construction company in Tokyo. When she was 17 years old, she discovered that her mother was actually not her real mother, and by chance she found out that her real mother was from Okinawa. Mai was very upset over the discovery, as she very much loved the mother who had raised her, and yet, she couldn't help but be curious about her real mother. She decided to fly out by herself to Okinawa to search for her real mother. While in Okinawa, Mai met Aragaki Kota, and the two began a wonderful relationship.|
Now, 15 years later, both Mai and Kota are adults, and fate has them encountering each other again. For Mai, their days spent at the Okinawan island of Koritou is something she will never forget, while for Kota, it is a past he has to let go. What is in store for the star-crossed lovers?