はたらく細胞BABY [Hataraku Saibō Baby]

A four-issue spinoff from Kōdansha (2020–2021), Hataraku Saibō Baby shifts the focus of the popular Cells at Work! franchise to the earliest stage of human life. Here, the body’s hardworking cells must adapt to the chaotic, rapidly changing environment of a newborn infant, tackling the unique challenges of a developing immune system and a world of first-time infections. While creator Akane Shimizu originated the concept, this series was written by Yūichirō Ueno and illustrated by Yūki Mizuguchi, offering a charming, educational, and slightly more vulnerable take on the inner workings of the body. It matters as a gentle, scientifically grounded expansion of the franchise’s premise, exploring how the cellular drama plays out when the host is at its most fragile.