Divided into 4 chapters entitled respectively 1970, 1974, 1976 and 1980, the story focuses on a young couple, Keiko and Kosuke. They meet during high school and soon become friends. Koisuke aspires to become a famous movie director and Keiko helps him with his project in a competition. The outcome is brilliant but not much later Keiko sees him kissing another girl. During the next years they will meet again, but will they be able to overcome their misunderstandings?