Kira and Jimin were childhood best friends who lived in Busan. Due to Kira's father being posted to Seoul by his company to work, Kira left Busan and Jimin when they were 8 years old. However, on the way to Seoul. Kira and her family met with an accident and although there were no lost of lives, Kira had unfortunately lost her memory. Jimin grew up never forgetting Kira and as he matured, he realised that he loved her more than any other girl. Kira's aunty stays in Busan right opposite Jimin. After 10 years, Kira finally returned back to Busan to live with her aunty for a month as her parents had some business to attend to in America. Kira and Jimin met finally after 10 years...