Ep. 18: Aira and Rizumu practice while receiving a fireworks festival invitation from Callings

18

Aira and Rizumu practice, with Aira struggling due to fatigue despite the summer heat. Callings invites them to a fireworks festival, and after the president initially refuses, Wataru persuades her to accept. Aira prepares in a short yukata but runs out of time, while Rizumu wanders toward the food area, leaving Hibiki to chase her. This leaves Aira, Shou, and Wataru together, where they encounter Mion. Shou covers Aira's mouth to prevent her from speaking, causing her to blush. Mion asks Wataru to hold her prizes, leaving Aira and Shou alone. When Aira stumbles, Shou catches her, causing a second blush. Shou later pushes Aira to close her eyes, revealing a stone matching her intended outfit. The episode concludes with Aira and Rizumu performing a prism show in their respective colored yukatas, followed by two couples watching fireworks together, though Shou whispers something inaudible to Aira.