Also known as: Hataraku Saibou: Kaze Shoukougun
Japanese title: はたらく細胞 新作エピソード「風邪症候群」
A mysterious cell wearing a stylish hat appears before the regular cells, who are bored with just the same (cell division) work over and over again, every day. This mysterious cell lures the regular cells into a mischievous scheme against White Blood Cell and Killer T Cell. The regular cells enjoy working out their everyday, pent-up frustration. But, just who exactly is this cell wearing a stylish hat?