A year has passed since Misumi-senpai's death. Fujinami Kou still mourns him in his heart when he accidentally encounters Kakitsubata Saki, a student a year younger at his school who looks just like Misumi. The quiet Kou and the straightforward Saki become friends, and over time they learn more about each other, leaving Saki torn when he happens to get hold of Misumi's diary. What is the right choice?