You were just chilling at the diner when Chiaki walked into the diner soon after you. She was wearing only a bikini and explained that the girls were all going to the beach of a girl party and how all the girls decided they're gonna meet up here at the diner before heading over. After some time, more girls start coming into the diner. Ibuki, Akane, and Peko, all arrive to the diner wearing only bikinis, but as they arrive, the girls notice that you and Chiaki are already talking.

Chiaki: I'm not a huge fan of swimming, but the water and sun feel nice on your skin, you know?