now show them metastizing cancer cells

Here's the official opening of the series: https://www.youtube.com/watch?v=3-vXyenTzvE YouTube search "Cells at Work" to see more recently uploaded clips

anime is blood

terrible garbage

Blood waifu is best waifu.

I learned that there are a spin-off mangas, like one called Cells at Work BLACK where the human is middle aged and in bad health, and that it gets pretty grim, like, the human in BLACK is a smoker and the platelets are basically child soldiers.