Ahhhhhhh this is so good, this whole chapter had just absolutely fantastic art/choreography/movement/shots, all of it is amazing. Like all those things someone earlier said but also stuff like the panel divider separating Koharu and Aki on page 13 showing that despite being next to each other they are firmly separated, every panel with Koharu standing behind Aki causing the tension to build up further, and page 18/19 having Koharu being the one to walk away vs Aki now being the one to walk away as a signal that she's moving on. It's just so good