Miura Aoi is an indecisive guy with a timid personality who dislikes summer. He once aspired to become an architect, but his dream has faded as he lets the days go by working as an assistant in a small architectural firm in Tokyo. Then one day, Aoi has a fateful reunion with Serizawa Akari, his first love and a childhood friend. Back in their school days, the two were always together. However, Akari suddenly disappeared in the summer of their third year in high school. Aoi forced himself to bury his feelings for her deep within him, but it could never truly be forgotten. Aoi's heart is once again moved by their unexpected reunion. However, there is another guy who is also named Aoi standing next to her..