This is the first time the show acknowledges that these kids actually go to school. Yui meets up with Kotoha after school, and Kotoha tells her about how Sat-chan got in trouble and had to stay late. Yui wishes she went to the same school as the other 2. Then Yui gets mad when Kotoha says she has no friends at her school, so then she makes fun of Kotoha for still being stuck on the first level of her game and offers to beat it for her.
Then they go looking for garbage to fill up a garbage bag. They try putting Saito in the garbage bag at first, but realized he won't fit.
Sat-chan smells something weird, and thinks it's a dead body, so then they go running off looking for a dead body, calling out for it as if it would answer them... instead, they find some smelly tree nuts. They spend a bunch of time picking up these tree nuts and rolling around on the ground and getting smelly, and then they go and attack Saito with them.
The girls dress up for halloween, and then they play a zombie game where Sat-chan and Kotoha go around giving people a piece of paper that says they're a zombie now, and they need to give that paper to other people to spread the zombie curse, and then it's Yui's job to save everyone. They got some high school girls to play along with them. Yui doesn't know the rules though, and she catches the curse by taking the zombie paper from a cat.
Yui reads the "emergency procedure on how to not be a zombie", it says you need to strip down to your panties and shout "this year, I'm a little extra daring". She goes into the club room and does this, and then continues to hunt for the boss zombie, there's a map to it written on the paper that cursed her. By the time she gets there, the others have gotten a bunch more people to pretend to be zombies with them. Yui uses a "zombie barrier" by closing her eyes and running toward the boss zombie and kicks it over to defeat it... lol this episode was great.