Published under the revised title Mattaku, Aokunai after winning as Haru ga Mata Kuru, this coming-of-age novel follows Ginma, a university student with a gifted singing voice, and Samin, Ranji, and Haru, the friends who gather around him in a share house. It portrays youthful intensity, secrets, loneliness, and anxiety about the future.

A white envelope quietly distorts the fragile balance of four young lives.