Hataraku Saibou!!

White-Blood-Cell-1146 encounters Backward-Cap during a capillary incident requiring platelet intervention.

White-Blood-Cell-1146 pursues a germ that believes its cuteness offers protection. During this chase, she meets Backward-Cap, a platelet undergoing training to increase his strength. A sudden event in the temple area leads to broken capillaries. The platelets must work to stop the resulting internal hemorrhage. Megakaryocyte, the cell responsible for producing platelets, provides some coaxing to help them manage the crisis. This encounter introduces Backward-Cap to White-Blood-Cell-1146 amidst the urgent medical situation. The group coordinates their efforts to address the bleeding within the body's infrastructure.

Memory Cell’s Visions and the Small Intestine Ambush

Memory Cell believes he sees the future but is actually recalling past vaccine memories. B Cell uses this data to defeat the Mumps virus invading the Parotid gland, then beats Memory Cell for his uselessness. In the small intestine, U-1146 tours with AE3083 and NT4201 while Killer T Cell criticizes his focus. Campylobacter bacteria take an Intestinal Epithelial Cell hostage, forcing white blood cells to surrender and humiliate themselves. They lure the invaders into a Peyer's patch for an ambush, destroying the bacteria. Killer T Cell apologizes to U-1146 but immediately retracts it upon realizing he forgot his charges, rushing to check on them instead.

Mast Cell faces backlash for histamine release while U-1146 battles acne bacteria in a pore.

In the first segment, Mast Cell becomes angry after cells complain about her histamine release causing inflammation. When a mosquito bite introduces the Dengue virus, Langerhans cells attack the body. Mast Cell initially refuses to act, but Basophil urges her to follow her instincts. She releases histamines to distract infected cells and alert the immune system, successfully eliminating the virus. The cells apologize, but Mast Cell insists her previous actions were correct. In the second segment, U-1146 investigates a pore where acne bacteria have enslaved hair and sebum cells. The bacteria killed Neutrophils, turning them into pus. A young hair cell feels insignificant, but U-1146 emphasizes individual worth. The bacteria king regenerates endlessly by consuming sebum. Inspired by U-1146, the hair cells produce excessive sebum, overwhelming the king. U-1146 defeats the king and survives the resulting sebum flood.

Normal Cell rescues bacteria from H. Pylori and joins U-1146 on patrol

Normal Cell, who wishes to save others, keeps four tiny bacteria as pets. AE3083 provides oxygen while U-1146 detects the creatures and confiscates them for disposal before heading to the stomach. Normal Cell follows, concerned for the bacteria. The stomach faces an attack by H. Pylori. Normal Cell saves the bacteria from falling debris, allowing one to defeat the H. Pylori so U-1146 can eliminate it. U-1146 identifies them as beneficial lactic acid bacteria. One bacterium remains in the stomach while the others stay with Normal Cell. U-1146 thanks him and invites him to join patrol. Later, they visit the small intestine, where a lactic acid bacterium consumes excess Purine and stays. Normal Cell accidentally drops another bacterium into a storm drain. U-1146 explains he lacks authority to stop immune cells from attacking it if mistaken for hostile, causing Normal Cell to cry and insult the immune cells. NK Cell arrives.

NK Cell attacks Normal Cell while Dendritic Cell aids a bacterium against influenza

NK Cell confronts Normal Cell for insulting immune cells, but U-1146 intervenes to resolve the conflict. Meanwhile, Dendritic Cell saves a lactic acid bacterium from a storm drain and provides care. The small intestine faces an attack from mutated influenza viruses that resist immune cell defenses, causing NK Cell to collapse in despair. The rescued bacterium produces Polysaccharides that empower Dendritic Cell to generate Cytokines, depicted as embarrassing photos that shock and motivate the immune cells to defeat the virus. After parting with the bacterium, Normal Cell apologizes to U-1146 and grants permission to take the final bacterium. Finally, NK Cell reveals to U-1146 that Cancer Cell has returned.

U-1146 and NK Cell investigate toxic gas in the large intestine while searching for Cancer Cell.

U-1146, Normal Cell, and NK Cell enter the large intestine, which is filled with toxic gas caused by harmful bacteria. AE3083 joins platelets for a tour of the area. The main Killer T Cell has been promoted to a Memory T Cell and joins the search for Cancer Cell. U-1146 instructs Normal Cell to go alone to locate the last lactic acid bacterium. Harmful bacteria invade, forcing Normal Cell to flee while AE3083 assists platelets in evacuating. Cancer Cell ambushes U-1146, NK Cell, and Memory T Cell. They defeat it, but it is revealed to be a copy. The real Cancer Cell appears, beats them, and declares they will see who deserves to survive.

Cancer Cell II Part I: Regulatory T Cell Defends Cancer Cell Amidst Cellular Chaos

Normal Cell, AE3083, and platelets continue their evacuation while Memory T Cell utilizes Cancer Cell's techniques for an advantage. The team is shocked when Regulatory T Cell defends Cancer Cell, mistaking him for a Normal Cell requiring protection. U-1146 is injured and trapped in a pod by Cancer Cell, who admires his contradictory nature as a defender with a killing function. Cancer Cell absorbs carcinogens from toxic gas to strengthen himself, planning to kill the body to ensure equal death for all. Regulatory T Cell effortlessly defeats NK Cell and Memory T Cell despite the threat. Meanwhile, Normal Cell is cornered by harmful bacteria. A lactic acid bacterium attempts to defend him but is swatted aside. Normal Cell orders the bacteria to flee, which it does, leaving him to be tortured by the bacteria.

Neutrophils and Lactic Acid Bacteria Rescue Normal Cell from Cancer Cell II

Neutrophils save Normal Cell but are overwhelmed by bacteria until lactic acid bacteria arrive to reverse the situation. After the toxic gas clears, Memory T Cell uses the jokingly taught T Cell Perforin Cannon Punch, which unexpectedly damages Cancer Cell. This success causes Regulatory T Cell to identify Cancer Cell as an enemy and attack. Deprived of carcinogens, Cancer Cell weakens and is killed by U-1146, who escapes his pod. As lactic acid bacteria repair the damage, U-1146 praises Normal Cell for bringing the bacteria. Memory T Cell attempts to teach the technique to Naive T Cells but fails to replicate it. Finally, AE3083 catches up with U-1146 before they resume their normal duties.

Thymocyte

Staphylococcus Aureus

A character suffers from heat stroke during the episode

Hemorrhagic Shock Part 1

Hemorrhagic Shock Part 2

The narrative focuses on a sudden upward movement or collision event.

Acquired Immunity and Peyer's Patch

Dengue Fever and Acne

H. Pylori and Antigenic Shift

Cytokines

Harmful Bacteria

The second part of the Cancer Cell arc, focusing on the initial segment

Cancer Cell II (Part II)