Eri (Matsubara) is a high school student who is anonymous unlike her friend Mitsuko (Yokoyama) who is the target of amorous advances from their teacher, Ichida (Tsubouchi). Eri comes across a novel way to protect Mitsuko: find a cursed funerary urn that contains ashes reputed to cause death and give said ashes to teacher.
Unfortunately the movie Kotsutsubo is not yet available on Disney Plus.
| Writing | Yoshimasa Akamatsu | Screenplay |
| Directing | Jirô Nagae | Director |
| Writing | Yusuke Yamada | Novel |
| Camera | Tetsuya Kudô | Director of Photography |
| Production | Hideo Tsujihata | Producer |