Kurosawa made Kitahara smell what's inside the bottle, she does use him but he also has some fun from it.
The letter on the bottle says "From after school joker. To: Asako Hoide", but it was supposed to be addressed to Yashiro Mako...
It was kinda heartless to Pizzata, but fool should know better since it was a forced confession that Kitahara felt ashamed, doesn't matter how he looks, it was just overall disgraceful.
Kobayashi and Nashimoto got together, that was unexpected.
Might have been wrong about Kitahara being after Kobayashi, she actually noticed he is after Takigawa and decided to let go of his hand.
I too like to thank developers of amusement park rides that splash people with water, we're all men of culture. Thank you for the food.
Eventually Kurosawa didn't broken a part Yashiro and Yamada relationship, seeing that he also found someone who seems to like.
I'm wondering what did Sugawa, Harada and Yashiro did to Kitahara that she can't say out loud... sounds like something horrible.