With the representative couple from EXchange Season 2, Lee Na-yeon and Nam Hee-doo in the studio as the panellists, all the participants gather in Jeju Island House and try to get to know each other. When things are about to get comfortable, the doorbell rings. New travel mates enter the house to join them. Are they exes or friends? Then the participants are told to write letters to introduce each other. With the sudden excitement and tension, how will the trip turn out? And what changes will the travel mates bring to the trip?
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