第 1 集: 白血球1146在需要血小板介入的毛細血管事件中遭遇反戴帽。
2021年1月9日 播出
While chasing a germ that thinks it's cuteness will protect it, White-Blood-Cell-1146 meets Backward-Cap, a platelet training to get stronger. A sudden incident in the temple's area causes a breaking of capillaries, and the platelets must stop the internal hemorrage, with some coaxing from Megakaryocyte (cell that produces platelets).