Tsukushi Makino is on the train to Atami with her friend, Kazuya Aoike, and her parents, Chieko and Haruo. They will be staying at Kazuya's villa, while the other students of Eitoku Academy are going to Hawaii. Tsukushi is somewhat disappointed that she will not see Rui Hanazawa during the summer. Upon arrival, they begin sightseeing, including visiting the local shrine and the beach. A yacht approaches the beach and Tsukushi comments, "That silhouette seems awfully familiar."
Much to Tsukushi's horror, the silhouette turns out to be Tsukasa Domyoji. He calls Atami the place "to be," as Eitoku students come out of their cabins, including Rui Hanazawa and Shizuka Todo. Shizuka invites Tsukushi to the party and offers her a dress, when Yuriko Asai and her friends complain that she will not be properly attired. Tsukushi refuses at first, until Shizuka enlists Rui's encouragement. Her parents also insist that Tsukushi go to party, so she can get close to Tsukasa.
In Shizuka's cabin, she first gives Tsukushi a makeover, before lending her a dress and a pair of shoes. Tsukushi feels ridiculous for a bit, but then imagines it as a Cinderella fantasy. Everyone gasps when Tsukushi enters the party. Tsukushi's eyes fall on Rui, who says "You look nice." Someone turns off the lights suddenly and chaos ensues. Tsukushi trips and falls onto someone, accidentally touching his lips with hers. The lights turns on and Tsukushi realizes that she has just kissed Tsukasa.