Reread the chapter and noticed 2 minor details I hadn’t noticed during the first read.
1) You can see first-year girlfriend by herself in a few of the mob shots and establishing shots. 2) Basketball girl looks like the same girl that Sakuya was sucking in C5. Though I’m not sure if she’s supposed to be important. Considering the screen time she got in this chapter... maybe?
I love the attention to detail Higashiyama-san puts into the characters and their placements, whether it’s for a mob/establishing shot or they’re just background characters.