High school student Aoi Aoi lives in a town surrounded by mountains. She was clearly in a critical period of deciding her future direction, but she was obsessed with her favorite music all day long. As a sister, Akane is very worried about her. At this moment, Akane's former lover, Shinnosuke, who went to Tokyo after graduating from high school, returned. At the same time, high school student Shinnosuke "Shinyuki" who is the same age as Aoi actually appears in front of Aoi! Unknowingly, Aoi develops a crush on Shinyuki... On the other hand, Akane and Shinnosuke reunite after thirteen years of separation. The "second first love" that connects the past and the present begins.
