
A popular English teacher, Mizuguchi Risako has been kidnapped three days before the high school's graduation ceremony. Four high school seniors received a mysterious challenge letter, asking them to solve the mystery of the kidnapping case within 72 hours. The four students are Kurokawa Yoshiki, his childhood friend Takahata Ayane, sports all-rounder Ogita Junpei, and school's beauty contest winner Komatsu Mio. The four students were wondering why they're the only ones who received the letter, but later gradually found out the "other face" of Mizuguchi which she has been hiding.

as Yoshiki Kurokawa

as Ayane Takahata

as Junpei Ogyuda

as Mio Komatsu

as Risako Mizuguchi

as Rintaro Ito

as Atsushi Nogami

as Wataru Ube

as Yumiko Kurokawa

as Taiji Kosuge

as Shizue Kakimoto

as Yumimi Kajiura

as Kyoji Ichihara

as Master

as Sota Teraki

as Rena Teraki

as Hisada

as Chika Nasukawa

as Chihiro Chiba

as Kosuke Sakai

as Yamaoka