A virtual beach called the Kamitoba Beach Resort has opened in Neo Kyoto! Hiyori wants to go to the beach because she has never experienced one in real life. To show her appreciation for their help in the battle at Keisen’s research facility, Sakura takes Hiyori and Teruto to the resort. As soon as they arrive, Hiyori has fun in the water, and they even get to see an idol event that is happening there. However, Sakura meets a girl there who tries to battle her and...?