Haruka Ozora travels to Okinawa to live with her cousin, Kanata Higa, and their grandmother. While exploring the beach, Haruka comes across Narumi Tōi and Ayasa Tachibana practising beach volleyball. Taking offense to an offhand comment from Haruka about being a future ace, Narumi, who appears to have a history with Kanata, challenges the two of them to score a single point against her and Ayasa...