[Machine Translation] It's summer! It's the ocean! Swimsuit time! Tsukita and the other members of the drama club go to the beach. While everyone is enjoying themselves, Hinata invites Tsukita to explore a cave. Tsukita and his friends enter the cave out of curiosity, but suddenly the ceiling of the cave collapses, trapping Tsukita and Airu. Despite the critical situation, the distance between the two grows even closer...?