Cells at Work! Code Black manga volume 4 features story by Shigemitsu Harada with art by Issei Hatsuyoshiya based on the original work by Akane Shimizu.

The red blood cells have a problem on their hands when their customers start refusing their sugar deliveries! The pancreas hasn’t been producing enough insulin, and without it, sugar just keeps accumulating in the body and causing problems for every cell along the way! The red blood cells travel to the pancreas to set things right, but what they find there is a situation more hopeless than they could have imagined…one that could spell doom for them all! Will these determined cells be able to save their new home?