The popular video streaming couple "Yu & Rika" are on location at the beach before the season begins. Yu, her boyfriend, is planning to propose to his partner and girlfriend Rika at the beach at night, calling it a "heart-thumping surprise." Meanwhile, Chiaki hates Yu because he is forced to do all the filming, editing, and chores for the videos, and wants to stop his beloved Rika from marrying Yu. While filming, he is muttering like a spell, "If I were Rika, I would break up with Yu," and then he loses consciousness... When he wakes up, Chiaki has taken over Rika's body...