Based on “Cells at Work!”, comes volume two of the spin-off series, “Cells NOT at Work!” Will these Erythroblasts undergo enucleation and become Red Blood Cells? Or will they be culled at the discretion of the Macrophages…? What will become of those who do not work?! Featured at the end of this volume is a manga which reports on what happens at the anime production studios in charge of “Cells at Work!”