Cells at Work!: Illegal

Cells at Work!: Illegal (はたらく細胞イリーガル) is a spin-off series focusing on the cells of a person taking illegal substances, written and illustrated by Kae Hashimoto. It began serialization in Kodansha's YanMaga Web digital manga platform on February 1, 2022. The series ended with the serialization on July 18, 2023.