The volume extra really ties into Sara's issues here. There's some really interesting things being set up between Sara, Natalia, and Leah's inner conflicts. And of course Enna's amazing in her disgruntled support role. I love when you can see how much thought Kamejiro's put into the details of the setting, with the tactics Sara uses to show off her experience. And I see that foreshadowing with this being the first time Sara's helped someone in a wheelchair.
Thanks for the reminder! I also highly recommend everyone subscribe to kamejiro's fanbox. They read/reply to almost every comment (english or japanese) too, sometimes giving some extra insight into the development of our favorite heroines.