Sora no Aosa wo Shiru Hito yo

A high school student named Aoi Aioi aspires to be a musician and lives in a mountain town with her older sister Akane. Akane abandoned her dream of moving to Tokyo with her former boyfriend, Shinnosuke Kanomura, a struggling guitarist, after their parents died in an accident 13 years ago. Aoi feels a deep sense of obligation toward Akane. When a renowned enka singer invites Aoi to perform at a music festival, Shinnosuke returns to their town after being away for a long time. Soon after, a mysterious figure named Shinno appears—revealed to be a past version of Shinnosuke from 13 years earlier. Aoi experiences her first love as a result of his presence.