Hataraku Saibou

is a Japanese manga series written and illustrated by Akane Shimizu. The manga was serialized in Kodansha's shōnen manga magazine Monthly Shōnen Sirius starting in March 2015, and is licensed by Kodansha USA. Few more manga based on the series serialized later on. An anime adaptation by David Production premiered on July 7, 2018.

Plot
This is a story about you and everyone, each having a tale about the inside of your body. According to a new study, the human body consists of approximately 37 trillion cells, working hard every day within a world that is your body. From the oxygen-carrying red blood cells to the bacteria-fighting white blood cells, get to know the unsung heroes and the drama that unfolds inside of you!