One day, while White Blood Cell (Neutrophil) is busy exterminating germs, he meets Backward Cap, a Platelet who wears her cap backwards. She is secretly training to become a stronger Platelet. However, a huge rumbling noise suddenly echoes inside of the body followed by violent shaking.
| Creator | N/A |
|---|---|
| Actor | Kana Hanazawa, Tomoaki Maeno |
| Country | Japan |
| Production | David Production |