Once again, they promised to meet at the Festival. Futaba and Kou, who had come within a millimeter of fulfilling their promise, but it never came to fruition. As summer vacation ends, Futaba confronts Kou, who had been unreachable, but his expression is different from before. Meanwhile, as preparations steadily progress for the cultural festival, Toma, who has begun to harbor feelings for Futaba, actively closes the distance despite knowing Futaba's feelings for Kou. After school, Futaba and Toma find themselves alone in an empty classroom.
At the end of the first year of high school, Futaba Yoshioka meets Kou Tanaka who was her first love. In their middle school days, they attended the same school, but he suddenly transferred to another school. Three years later, he appears in front of her again with the different last name of Kou Mabuchi. His personality also seems to have changed from warm to cold. He is like a totally different person from three years ago. Futaba Yoshioka slowly learns what happened to Kou Mabuchi for the past three years and she become to have feelings for him again.
