Rentarou and Kusuri race off for the chemistry lab in order to produce enough neutralization drug for all four of the other girls, who are much faster than normal due to the drug in their systems deactivating their rationality limiters. Kusuri suggests using a skin-burning drug to slow them down, but she accidentally splashes the vice principal, shocking Kusuri when she finds that the drug only caused the vice principal's makeup to melt off her face.
Nano sends the other girls down different hallways in order to corner Rentarou with a pincer attack. Rentarou responds by having him and Kusuri split up, leaving only Shizuka chasing him. She trips and falls, and Rentarou takes her to the nurse's office. After treating her and getting attacked by her, Rentarou hangs Shizuka onto a coat hanger and sets off in search of the others.
Rentarou is quickly spotted by Hakari and Karane, who use a meteor bullet to take down Rentarou. The two take turns kissing him, but they quickly start fighting over him, leading him to realize their original personalities are still intact. To this end, he presses their lips together, creating a distraction for them and allowing him to make his way to the chemistry lab.
Unfortunately, Nano is in the chem lab, forcing him to run and hide in a nearby locker. As Nano begins searching for Rentarou, he hopes that Kusuri was able to reach the lab and start making the neutralization drug.
But then he finds Kusuri hiding in the same locker as him.
Tropes:
- Comically Missing the Point: Kusuri is more concerned that her drugs can be blocked by makeup than she is about the sight of the Vice Principal's makeup melting off her face.
- "Eureka!" Moment: Rentarou has one when he realises that Hakari and Karane are still the same even after becoming zombies, and uses this to get them to kiss each other and escape while they're distracted.
- Fastball Special: Hakari and Karane pull off one while pursing Rentarou, with Hakari as the person being thrown.
- Girl on Girl Is Hot: Rentarou is so awed by watching Hakari and Karane kiss that he briefly forgets to escape.
- Oh, Crap!: Rentarou has this reaction twice in a row - first when he sees Nano in the chem lab, then when he realises that Kusuri is in the locker with him.
- Shout-Out: Rentarou mentions Resident Evil while in the infirmary with Shizuka.
