Hataraku Saibou / Cells at Work! - The collab of the century

Once again the Red Cross takes me for a blood cuck, who would allow his precious Red Blood Cells, Platelets, and Macrophages to circulate in another man's body.

This is so awesome! Combining anime with blood donation, a very noble cause. I’m a blood donor myself, so I know the significance of donating my blood and to apply it to an educational anime starring blood and their various properties is a pretty clever crossover.