Three former middle school friends who reunited after 37 years to pursue the mystery behind their former club advisor's disappearance.
'Yun' Yuta Yoshii
'Chen' Hajime Fujimaki
'Kinpo' Kisuke Kikuhara
'Matilda' Michiru Miyashita
Hakuba Nishino
Tsurumi
Kento Yoshii
Satsuki Onodera
Shoko Kikuhara
Young 'Yun' Yuta Yoshii Yuta
Young 'Kinpo' Kisuke Kikuhara
Aya Yoshii
