Moyashimon

It's the first day of Tadayasu and Kei's university life. Tadayasu shows off his ability to Professor Itsuki and Haruka. The talent show is cut short when Tadayasu spots fructivorans in the air.

Tadayasu and Kei follow the fructivorans and find a spilled tank of spoiled sake. They meet the perpetrators Kaoru and Takuma who invite them to their dorm room.

Hazuki Oikawa is introduced. She comes to Kaoru and Takuma's dorm room and kills the bacteria they were planning to cultivate. Everyone is summoned back to the lab where Professor Itsuki and Haruka show them how to make sake for educational purposes.

The first years are invited on a tour around the campus and a picnic. Tadayasu spots harmful bacteria in the food and saves everyone from E. coli food poisoning.

Tadayasu becomes disgusted when he sees a man covered in microbes. Professor Itsuki asks everyone to buy liquor at Hiyoshi Liquor Store near the school. Tadayasu discovers the owner is the microbe monster who brews delicious sake.

Aoi Mutō returns from a long trip bringing fermented meat. She also brings Vibrio parahaemolyticus, El Tor, Shigella dysenteriae, Salmonella enterica and Plesiomonas shigelloides. After getting disinfected, Aoi brings Tadayasu to the UFO club room where all the members are sick and unintentionally breeding new forms of influenza with pigs and chickens.