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.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Episode 1 | 2022-04-04 | 15 min |
| Season 1 | Episode 2 | Episode 2 | 2022-04-05 | 15 min |
| Season 1 | Episode 3 | Episode 3 | 2022-04-06 | 15 min |
| Season 1 | Episode 4 | Episode 4 | 2022-04-07 | 15 min |
| Season 1 | Episode 5 | Episode 5 | 2022-04-11 | 15 min |
| Season 1 | Episode 6 | Episode 6 | 2022-04-12 | 15 min |
| Season 1 | Episode 7 | Episode 7 | 2022-04-13 | 15 min |
| Season 1 | Episode 8 | Episode 8 | 2022-04-14 | 15 min |
| Season 1 | Episode 9 | Episode 9 | 2022-04-18 | 15 min |
| Season 1 | Episode 10 | Episode 10 | 2022-04-19 | 15 min |
| Season 1 | Episode 11 | Episode 11 | 2022-04-20 | 15 min |
| Season 1 | Episode 12 | Episode 12 | 2022-04-21 | 15 min |
| Season 1 | Episode 13 | Episode 13 | 2022-04-25 | 15 min |
| Season 1 | Episode 14 | Episode 14 | 2022-04-26 | 15 min |
| Season 1 | Episode 15 | Episode 15 | 2022-04-27 | 15 min |
| Season 1 | Episode 16 | Episode 16 | 2022-04-28 | 15 min |
| Season 1 | Episode 17 | Episode 17 | 2022-05-02 | 15 min |
| Season 1 | Episode 18 | Episode 18 | 2022-05-03 | 15 min |
| Season 1 | Episode 19 | Episode 19 | 2022-05-04 | 15 min |
| Season 1 | Episode 20 | Episode 20 | 2022-05-05 | 15 min |
| Season 1 | Episode 21 | Episode 21 | 2022-05-09 | 15 min |
| Season 1 | Episode 22 | Episode 22 | 2022-05-10 | 15 min |
| Season 1 | Episode 23 | Episode 23 | 2022-05-11 | 15 min |
| Season 1 | Episode 24 | Episode 24 | 2022-05-12 | 15 min |
| Directing | Tanaka Kenji | Director |
| Writing | Yusuke Watanabe | Screenplay |
| Writing | Yamazaki Taiki | Screenplay |