Even when a baby turns over in bed, there are many cells working hard behind the scenes to make it happen! This third volume of the manga featuring anthropomorphized cells working in a baby’s body is dedicated to all the busy moms and dads out there, as well as everybody else who was all once babies! In this volume, the cells will be dealing with urination and diaper rash. The baby continues to grow and starts eating solid food. However, the antibodies from the mother also begin to vanish one by one! How will the cells handle this situation?