The girls' trip to Chiyo-chan's summer house is referenced in this chapter, firstly with Tomo showing Kaorin pictures from it (the ones with Sakaki in them especially make Kaorin regret not going) and secondly with Chiyo having a painful flashback at the very mention of the Yukarimobile. Even hearing Tomo talk about cars in general makes Chiyo burst into tears.
Kaorin mentioned earlier that she is a member of the Astronomy club. In this chapter, she says she took a school club trip the day of the other girls' vacation.
It was implied earlier that Chiyo had a dog. Here, the dog, named Tadakichi-san, is seen for the first time.
It is already known that cats dislike Sakaki and won't let her pet them. This is why Sakaki nervously asks Chiyo if it really is safe to pet her dog, since it's so big and probably could end up hurting her badly if it did bite her.
Tomo says that she heard on TV that you were safe from lightning in a car.
When the class take a vote between Tomo and Chiyo-chan in order to decide on a class president, 3 out of 33 students voted for Tomo, and the rest for Chiyo. It is unknown who the three people voting for Tomo were.
Tomo shows Kaorin a photo of herself and Sakaki in bed together. We do not know who took the picture of them.
Chiyo-chan mentions an old man being threatened by the Yukarimobile, but we do not find out how exactly how that story ended.
In one of the photos of Sakaki, it looks like there is a ghostly face behind her, but what this is exactly goes unmentioned.
Nobody volunteers for the position of class president, save Tomo. Since everyone agrees that electing her would be an utter disaster, they unanimously decide on Chiyo-chan without even asking her first.
In this chapter, the recurring character Kimura is introduced. The girls and teachers despise him, though the boys admire him for his honesty.
Tadakichi-san's official introduction. He is the first animal in the series to let Sakaki pet him, and from the looks of it, Sakaki petted him all day. Chiyo is even able to ride him, because he is so big.
I can't help but get the feeling that electing Tomo will lead to unmitigated disaster.