Sayonara made no 30 pun

Aki Miyata was a musician and died one year ago. He had bright and positive personality. Sota Kubota is a university student, who is not good at socializing with people. One day, Sota picks up a cassette tape, which was left by Aki. If Sota plays the cassette tape, Aki's spirit takes over hiss body for only 30 minutes. With Aki's spirit in his body, Sota goes to see Aki's former girlfriend Kana Murase and his other bandmates.