So Long! (2013)

Sinopsis

AKB48 Drama split in 3 parts for each team Team A story: Kawakami Fukaba is the only remaining member of the Broadcasting Club. While she was cleaning the clubroom, she encountered a strange cassette player that connects her to another member of the club 8 years earlier. Team K story: Miho is annoyed at her younger sister Tsubasa, who is trying to make her participate in a piano competition. Unknown to Miho, Tsubasa is hiding something from her. Team B story: Asuka keeps a blog titled "Tsuki ga nai Sora" (Moonless Sky), where she writes about all her problems. The only person who comments on the blog is called Spaceboy (6B6), and seems to know more about Asuka than anyone in her class.