十八歳

Moto Ôno

Kei Kusumoto

小林節彦

Seiichi Yanagihara / Kei's father

Natsuhiko Ueda

Yuji Inoue, the tutor

伊藤清美

Sawako Kusumoto, Kei's mother

山本竜二

Yakuza

Kensuke Suzuki

Boy A