More than a Married Couple, but Not Lovers — S1 E7 - Fireworks, but No Embrace.

After seeing Shiori and Jiro together, Natsumi and Sachi try to ascertain Akari’s feelings, but she’s vague on the subject. The girls want to give Akari a decisive moment and come up with a plan for a group date to a fireworks festival with Minami.