In a typically symmetrical fashion, after a repeat scene where it becomes apparent that both of them are on the same train, Sangwon also visits the Kangwon Province with a friend and the paths of the two characters cross without them ever meeting there, both of them encountering a couple involved in a murder investigation.
Following a repeat scene where they're both on the same train, Sangwon travels to Kangwon Province with a companion, but their paths never intersect, and both encounter a couple entangled in a murder inquiry.