I notice you’ve provided what looks like a file naming string rather than a prompt for an actual essay. The string:

A study of how the show uses flashbacks in this specific episode to subvert the audience's initial perceptions of the characters.

: Flashbacks reveal the origins of Sun and Jin’s relationship in Seoul, showing Jin as a humble waiter who falls in love with Sun, the daughter of a powerful businessman. It details how Jin’s personality changed after he began working for Sun's father to earn his approval for their marriage.