On the Saturday a week before the Autumn Festival, the Multipurpose Hall on the first floor of Keyaki Mall was temporarily requisitioned for the joint booth preparation meeting. Class D and Class C's joint project was to complete its first full rehearsal today, moving from paper plans to physical implementation. Before the meeting began, Horikita Suzune projected the final draft of the joint proposal onto the Multipurpose Hall's white wall. The twelve-page document flipped by page after page, each one having undergone at least three revisions by her. Karuizawa Kei headed the food team, and the pairing plan for autumn-limited desserts and drinks had been refined down to the serving temperature and ideal tasting time for every item. Sudo Ken and Ishizaki Daichi jointly led the venue team, and the on-site layout they brought showed that the traffic flow between Class C's shooting booth and Class D's dessert booth had been fully integrated. Shiina Hiyori reviewed the cross-class cooperation clauses one by one, with citation numbers and original texts all marked in the standardized citation index in the proposal's appendix. Sakura Airi was in charge of video documentation, and the visual plan she submitted included fixed camera angles, mobile behind-the-scenes footage, and the timing for same-day photo delivery.
Ryuen Kakeru sat near the back of the Multipurpose Hall. He did not take part in reporting on the individual projects. Instead, he recorded every potential risk mentioned by each group in his notebook—the serving temperature of the desserts might deviate from the standard due to outdoor temperatures, spare rubber bullets needed to be reserved in advance to account for attrition at the shooting booth, and crowd congestion might occur during peak periods along the joint route. Every risk was followed by a response plan and the person responsible. Kanzaki Toru noticed