Set on Hashima Island in Nagasaki Prefecture during the coal industry's rise in 1955, this story follows themes of family, friendship, and love. It contrasts the post-war era, where people had little but were full of dreams, with present-day Tokyo, where abundance prevails, but young people struggle to find their dreams.

• Ryunosuke Kamiki
• Takumi Saitoh
• Hana Sugisaki
• Tao Tsuchiya
• Elaiza Ikeda
• Tomoko Nakajima
• Mirai Yamamoto
• Nobuko Miyamoto