S1·E6 Cinderella for a Night

Tsukushi and her parents go on vacation with Kazuya to Atami. There she is greeted by Tsukasa standing atop his yacht. Shizuka invites her to a party they are holding that night and helps her get ready. Tsukushi feels like "Cinderella" for a brief time until she sees Rui dancing with Shizuka.