Matsubara plays an inconspicuous female high school student Eri who goes completely unnoticed by her classmates. In contrast, her childhood friend Mitsuko (Yokoyama) is the class leader and is constantly hit on by their creepy teacher, Ichida (Mamoru Tsubouchi). In order to protect her friend, Eri obtains a funerary urn rumored to hold ashes that cause certain death for anyone who gets them in their mouth.