The popular video couple "Yu & Rika" had come to the sea for a location shoot too early in the season. Yu, as the boyfriend, planned to propose to his partner and girlfriend Rika at night by the sea, calling it 'heart-pounding.' On the other hand, Chiaki, who was burdened with filming, editing, and miscellaneous tasks, hated Yu and wanted to stop Rika from marrying him. During the shoot, Chiaki muttered like a spell, 'If I were Rika, I'd break up with Yu,' and then lost consciousness... When she came to, Chiaki found herself possessing Rika's body...
