That was my exact same reaction to that scene in the manga as well...that girl is obviously one of the new characters I was referring to in my last post. I don't dislike her entirely but I personally prefer the plot more when it focuses on Adagaki, Makabe, and Yoshino and less on the side characters so I'm interested in seeing the reaction of the anime fans on her.
This new girl is a fucking demon LMAO, there's no way this cute jesus saved me bit is real xD I like her so far though, she's fucking crazy lol
Other than that, I REALLY liked this episode and I really don't understand why it seems like so many manga readers hate this stuff considering that this type of drama is standard in romance series
Even though it sucks that Aki is being a bitch to Masamune over this stuff, it's not like her actions are out of character or anything, and to be fair, it's not like she and Masamune were dating either, plus they're kids FFS
But what TRULY made this episode great, was DAT STAR WARS REFERENCE.....ALL HAIL AKI VADER *Insert Breathing Sounds Here*