Bullied incessantly at school because of her weight, a girl named Maki decides to go on a diet. She soon becomes slim and beautiful, envied by all her classmates, but her weight loss does not stop there. She grows thinner and thinner until she is nothing more than skin and bone. This is the title story in a horror anthology that includes four other unsettling tales set in school environments. In The Red Satchel, a girl named Haruna returns to school with a deathly appearance before disappearing, leaving behind only her red satchel and its gruesome contents. Two Sisters follows young and popular teacher Ms. Numata, whose outer beauty conceals a ghastly secret she has kept since birth. In Caterpillar, a girl named Mayuko is relentlessly bullied for her fascination with caterpillars, but she knows her true destiny lies elsewhere. The stories are told with grotesque, simple character designs and focus on themes of bullying, bodily transformation, and revenge, often ending with supernatural or horrific consequences. The setting is primarily Japanese elementary or middle schools, and the narrative arcs are self-contained, each building toward a shocking revelation or a grim fate for the characters.