Inside the complex human organism, about 37.2 trillion cells work tirelessly day and night, every single day of the year. Freshly graduated from training, the upbeat yet slightly scatterbrained Sekkekkyuu AE3803 is ready to take on the crucial task of transporting oxygen. Meanwhile, Hakkekkyuu U-1146 diligently patrols and eliminates invading bacteria that aim to colonize the body as their new home. Elsewhere, tiny platelets line up for a fresh assembly project. Dealing with wounds and allergies, getting lost on the way to the lungs, and quarreling with similar cell types, their daily lives remain chaotic as they collaborate to keep the body healthy for the overall health and vitality today.
