Eri (Matsubara), a high school student who tends to blend into the background, is quite different from her friend Mitsuko (Yokoyama), who is the object of their teacher Ichida’s (Tsubouchi) romantic interest. To shield Mitsuko from these unwanted attentions, Eri devises an unusual plan: she seeks out a cursed funerary urn, rumored to hold ashes that bring death, and intends to give these ashes to the teacher.